[InstaZDLL]

Phase A of the backend restructuring, storage half: src/database.rs (2,953 lines) and src/catalog.rs (2,926 lines) become src/database/ and src/catalog/, split along their domains. Code was moved, not changed. No function was renamed, no signature or SQL changed, and no comment was rewritten. Every public path is the same as before (the three unused pub(crate) exceptions are listed under "Visibility changes"): crate::database::X and crate::catalog::X resolve through explicit pub use / pub(crate) use lines in each mod.rs, and nothing under tests/ was edited.

Commits:

1. git mv of both files to */mod.rs and nothing else, so git records the renames.
2. The database split.
3. The catalog split.
4. Dropping the three pub(crate) re-exports that nothing in the crate used.
5. Moving the MusicBrainz paragraphs onto consolidate_catalog_derivations, a doc comment placement fix from review. Nothing else in the code changed.

src/database/

File	Lines	What it holds (moved from database.rs)
mod.rs	426	Module docs, MIGRATOR, SchemaState, the Database struct, and the database's own lifecycle: open, migrate, migrate_on, run_migrations_unenforced, normalize_legacy_crlf_migration_checksums, ping, integrity_check, backup_to, check_file, open_alone, schema_state, pool, pid, writer_guard, begin_write. Also the helpers its children share: parse_uuid, parse_role, insert_audit. Then the mod and pub use lines.
keys.rs	297	Instance key: KeyMaterial, Rekey, bind_instance_key, check_file_instance_key, stored_key_fingerprint, key_material, rekey
accounts.rs	146	AccountRole, AccountRecord, setup_required, bootstrap_admin, create_account, account_by_username, account_by_id, account_from_row
sessions.rs	592	ApiTokenRecord, SessionRecord, NewApiToken, AccessRecord, NewSession, NewAuthorization, AuthorizationRecord; OAuth authorizations (create_/redeem_/prune_authorizations, spawn_authorization_pruning), devices, sessions (create, lookups, rotate, revoke), API tokens (create, list, revoke, lookup); session_from_row, api_token_from_row, encode_scopes, decode_scopes
libraries.rs	289	LibraryVisibility, LibraryRole, create_library, add_/remove_library_member, set_library_accepts_uploads, set_library_accepts_canvas
subsonic_credentials.rs	176	SubsonicCredentialStatus, set_/revoke_/rotate_subsonic_credential, subsonic_credential_status
sync_operations.rs	90	SyncOperationReplayRecord, SyncOperationReservation, reserve_sync_operation
metadata.rs	453	The second impl Database block, verbatim: metadata_artist_rows, metadata_artist_similar, link_artist_portrait, link_artist_fanart, lyrics_lookup_row, write_lyrics_lookup, write_metadata_artist, plus link_portrait_in, link_fanart_in, unlink_fanart_in, record_artist_moves
tests.rs	575	The inline mod tests, de-indented. It still starts with use super::*

src/catalog/

File	Lines	What it holds (moved from catalog.rs)
mod.rs	94	Module docs, the mod and pub use lines, and what the children share: LibraryChange, record_library_event (the change feed, written by apply, availability and database::metadata), parse_uuid
libraries.rs	244	LibraryRecord, LibraryScanSettings, LibraryAccess, libraries_for_user, all_libraries, library_scan_settings, watched_libraries, library_for_user, server_property, set_server_property, request_full_scan_everywhere, request_full_scan, full_scan_requested, library_from_row
scan_jobs.rs	437	ScanJobRecord, scan_progress_for_user, create_scan_job, create_scoped_scan_job, scan_scope, queued_scan_jobs, insert_scan_job_in, create_scan_job_for_user, start_scan_job, start_walked_scan_job, update_scan_job, finish_scan_job, fail_scan_job, scan_job_for_user, scan_job, add_scan_error(s), scan_job_from_row
derivations.rs	249	consolidate_sort_names(_in), consolidate_catalog_derivations(_in)
identity.rs	465	ExistingTrack, reconcile_catalog_identity, clear_track_hints_if_spec_changed, remap_artist_user_data, existing_track_by_path, relocation_candidates(_by_pid), backfill_track_pids, TrackIdentity and its PidSource impl, track_credits, album_artist_display, track_pid, REMAP_STAGE, move_artist_user_data, existing_track_from_row
apply.rs	665	ArtworkInput, CatalogTrackInput, CatalogApply, ApplyOutcome, apply_catalog_track(s), apply_catalog_track_in_transaction, upsert_artwork, upsert_artist, upsert_genre, upsert_album, split_values
availability.rs	233	SkipFacts, mark_track_seen, track_skip_facts, set_sidecar_signatures, mark_tracks_under_seen, mark_tracks_seen, mark_unseen_unavailable(_within)
tracks.rs	239	StreamTrack, TrackRecord, list_/search_/browse_tracks_for_user, stream_track_for_user, MAX_SEARCH_QUERY_CHARS, MAX_SEARCH_TERMS, fts_prefix_query, fetch_tracks, stream_track_from_row, track_from_row
overrides.rs	122	display_of, TrackOverrideLists, track_override_lists, apply_track_override_lists
credits.rs	280	credits_in_role, with_album_artist_sorts, credit_decisions, write_track_credits, read_track_credits, Recomputed, recompute_track_participants, credit_names
tests.rs	27	The inline mod tests (the search-bound test)

The longest code file is catalog/apply.rs at 665 lines, and the longest tests.rs is database/tests.rs at 575.

Where this departs from the suggested shape

• database: record types sit with their domain, not in a records.rs. AccountRole is in accounts.rs, the two library enums are in libraries.rs, the credential shapes are in sessions.rs, and so on. A records.rs would have been a list of types with nothing that uses them. parse_uuid, parse_role and insert_audit are in mod.rs because four children call them.
• database::check_file_instance_key is in keys.rs, not beside check_file. It reads the key fingerprint, so it belongs with the key. check_file stays in mod.rs.
• database/sync_operations.rs (90 lines) is new. reserve_sync_operation and its two types make up the sync idempotency ledger, which is neither lifecycle nor accounts.
• catalog: consolidations are in derivations.rs, not scan_jobs.rs. They are 240 lines that derive data from the catalogue's contents, not job bookkeeping. Credit decisions also run them inside their own transaction (*_in).
• catalog: the seen/unseen/skip-facts/sidecar methods are in availability.rs, not apply.rs. Together with them, apply.rs would have come to about 870 lines, over the 800 limit. Recording which tracks a scan saw is also a different job from writing a file's rows.
• catalog/credits.rs is new. The brief would have put these functions in overrides.rs, but RFC-015 credit decisions are their own domain, separate from tag corrections. overrides.rs keeps only the correction helpers.
• No catalog/rows.rs. Each *_from_row is used by one file only, so it sits in that file. parse_uuid is the one shared helper, and it is in mod.rs.

Visibility changes the split required

All of them are pub(super), on items that were private and are now called from a sibling file:

• catalog::identity: TrackIdentity and TrackIdentity::new, track_credits, album_artist_display. All are used by apply.
• catalog::apply: upsert_artist (used by overrides and credits) and upsert_genre (used by overrides).
• catalog::credits: credit_names (used by apply and identity) and with_album_artist_sorts (used by apply).

Three pub(crate) items are no longer re-exported at their parent path: database::SyncOperationReplayRecord, catalog::read_track_credits and catalog::Recomputed. Nothing outside their own file uses any of them. Re-exporting them only made rustc report an unused import, and keeping them would have needed an #[allow(unused_imports)]. The items themselves are unchanged, in database/sync_operations.rs and catalog/credits.rs. Every pub path, and every pub(crate) path the crate actually uses, is still re-exported.

Proof that nothing was lost

• cargo test --all-features -- --list | grep -c ': test$' gave 663 before and 663 after. The sorted name lists match line for line: database::tests::* and catalog::tests::* keep their names because each tests.rs sits directly under its module.
• I compared every non-blank line of the two original files, with indentation stripped, against the new files. Every original line is in the new files. The only original lines that changed are the use lines and mod tests {.
• cargo fmt --all --check: pass. rustfmt rewrapped only two function signatures, which grew past the line limit when they gained pub(super).
• cargo clippy --all-targets --all-features -- -D warnings: pass.
• cargo test --all-features: pass. 663 passed and 0 failed, across the library, the binary and the 23 integration targets. The run used -j 2 and its own CARGO_TARGET_DIR.

For phase B

• CLAUDE.md says "SQL belongs in src/database.rs, src/catalog.rs or src/services/", and AGENTS.md says "SQL stays in src/database.rs or later repository modules". Both name files that are now directories, and both need updating when phase B settles where the modules live. This PR leaves them alone on purpose.

Noticed, deliberately not changed

• catalog: in the original file, the doc comment on consolidate_sort_names opened with the paragraphs describing the MusicBrainz vote ("Recomputes the derived MusicBrainz identifier…"). There was no break between them and the function's own doc, so rustdoc attached both to consolidate_sort_names. This one was fixed here, after review. The paragraphs now sit at the end of the doc of consolidate_catalog_derivations, the function that runs that vote, after a /// separator. The wording is unchanged; that separator is the only line added.
• catalog: apply_catalog_track_in_transaction puts #[allow(clippy::too_many_arguments)] before its doc comment, and that comment is two comments run together: "Reachable from the domain services…" and then "Writes one track into the catalogue." The doc for record_library_event ("Appends one fact to a library's change feed…") sits above LibraryChange instead, merged into that struct's own doc. Both stayed exactly where they were.
• catalog: several SQL literals hold long runs of spaces where a \ line continuation was lost at some point: track_skip_facts, mark_tracks_under_seen, write_track_credits, read_track_credits and the participant insert in recompute_track_participants. SQLite ignores the whitespace, so behaviour is unaffected. They were moved byte for byte.
• database::metadata: link_portrait_in writes out the same per-row "parse the ids, record an artist event" loop that record_artist_moves holds. link_fanart_in and unlink_fanart_in call record_artist_moves; link_portrait_in does not. The two could be merged later, but not in a move.

Summary by CodeRabbit

• Nouvelles fonctionnalités

  • Ajout de la gestion des comptes, des sessions et des jetons d’accès, avec contrôle de validité et options de révocation.
  • Ajout de la gestion des bibliothèques, de leurs membres, des rôles et des autorisations.
  • Ajout de la consultation, de la recherche et de la lecture des pistes, ainsi que de la gestion du catalogue et du suivi des scans.
  • Ajout de la mise à jour des métadonnées et des crédits, de la sauvegarde, des contrôles d’intégrité et de la gestion des clés de la base de données.

• Tests

  • Ajout de tests de régression pour la recherche, les migrations et la préservation des données.

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• src/catalog/derivations.rs

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Walkthrough

La PR ajoute la fondation SQLite et des dépôts pour les comptes, les sessions, les bibliothèques, les pistes, les scans et les métadonnées. Elle ajoute aussi la gestion des clés, des opérations de synchronisation, des migrations et des opérations de catalogue.

Changes: Écriture et identité du catalogue

Layer / File(s)	Summary
Crédits et corrections src/catalog/credits.rs, src/catalog/overrides.rs, src/catalog/mod.rs	Les crédits sont stockés et recalculés. Les corrections de titre, d’artistes et de genres sont lues et appliquées.
Application transactionnelle des pistes src/catalog/apply.rs	L’application unitaire délègue au traitement par lot. Le lot applique les pistes, les entités associées, les index et les événements dans une transaction.
Identité et relocalisation des pistes src/catalog/identity.rs	Les spécifications PID, la recherche de pistes existantes et de candidats à la relocalisation, ainsi que le transfert des favoris et évaluations sont ajoutés.
Consolidation des données dérivées src/catalog/derivations.rs	Les noms de tri, identifiants MusicBrainz, crédits d’album, statistiques et index d’artistes sont recalculés depuis les pistes disponibles.

Bibliothèques, scans et lecture du catalogue

Layer / File(s)	Summary
Accès et paramètres des bibliothèques src/catalog/libraries.rs	Les bibliothèques accessibles, leurs paramètres de scan et les demandes de scan complet peuvent être consultés ou mis à jour.
Tâches de scan et disponibilité src/catalog/scan_jobs.rs, src/catalog/availability.rs	Les tâches enregistrent leur portée, leur progression et leur résultat. Les pistes vues sont marquées disponibles. Les pistes non vues peuvent être rendues indisponibles selon le périmètre du scan.
Lecture, recherche et streaming src/catalog/tracks.rs, src/catalog/tests.rs	Les méthodes de liste, recherche, navigation et streaming sont ajoutées. La recherche limite et transforme les termes pour FTS5. Les tests couvrent les requêtes longues et Unicode.

Services et dépôts SQLite

Layer / File(s)	Summary
Connexion, migrations et intégrité src/database/mod.rs, src/database/tests.rs	La configuration SQLite, les migrations, les contrôles d’intégrité et l’état du schéma sont ajoutés. Les tests couvrent la conservation des données et plusieurs migrations.
Comptes et gestion des bibliothèques src/database/accounts.rs, src/database/libraries.rs	Les comptes, rôles, bibliothèques et membres sont créés ou consultés. Les changements de bibliothèque concernés enregistrent des audits.
Sessions, autorisations et jetons src/database/sessions.rs	Les sessions et autorisations OAuth sont créées, validées, renouvelées ou révoquées. Les jetons API sont créés, consultés et révoqués.
Clés et identifiants Subsonic src/database/keys.rs, src/database/subsonic_credentials.rs	Les empreintes de clé et les secrets associés sont vérifiés, ré-encryptés ou supprimés selon le plan de re-clé. Les identifiants Subsonic sont configurés, révoqués ou renouvelés.
Caches de métadonnées et paroles src/database/metadata.rs	Les caches d’artistes et de paroles sont lus et écrits. Les liaisons d’illustrations mettent à jour les artistes concernés et leurs événements.
Réservations de synchronisation src/database/sync_operations.rs	Les opérations sont réservées par utilisateur et identifiant. Les conflits renvoient un état incomplet ou les données de rejeu disponibles.

Priority: Low

Estimated code review effort: 5 (Critical) | ~120 minutes

Change: Refactor

Possibly related PRs

• InstaZDLL/waveflow-server#316 — Ajoute le découpage des crédits et les recalculs transactionnels repris dans les modules du catalogue.
• InstaZDLL/waveflow-server#331 — Introduit BEGIN IMMEDIATE et begin_write, repris dans la fondation SQLite et les écritures du catalogue.
• InstaZDLL/waveflow-server#328 — Ajoute les réglages de bibliothèque, les tâches de scan et la disponibilité, répartis dans les modules du catalogue.

Merge Risk: Moderate · up to 6f769

Genre updates can fail for duplicated inputs, potentially blocking catalog scans or corrections; resolve these issues before merging.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 48.85% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 174 functions across 20 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		Le titre décrit clairement le changement principal : la séparation de la base de données et du catalogue en répertoires de modules.
Description check		La description est complète. Elle présente l’objectif, les changements par module, les écarts de visibilité, les validations exécutées et les points reportés à la phase B. Elle ne reprend pas exacteme…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

La description est complète. Elle présente l’objectif, les changements par module, les écarts de visibilité, les validations exécutées et les points reportés à la phase B. Elle ne reprend pas exactement les titres du modèle et ne contient pas la confirmation DCO explicite, mais ces écarts ne compromettent pas l’information nécessaire à la revue.

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

Prompt to fix review comments

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/catalog/apply.rs:
- Around line 451-460: Dans la boucle qui insère les lignes `track_genre`,
mettez à jour la requête `INSERT` pour ignorer les conflits sur la clé
`(track_id, genre_id)`, afin qu’un genre répété ne fasse pas échouer la
transaction.

Review comments at @src/catalog/derivations.rs:
- Around line 10-32: Déplace la documentation sur le vote des identifiants
MusicBrainz de consolidate_sort_names vers consolidate_catalog_derivations, en
la plaçant avec la documentation de cette dernière fonction. Laisse la
documentation propre à consolidate_sort_names attachée uniquement à cette
fonction et ne modifie aucun comportement.

Review comments at @src/catalog/overrides.rs:
- Around line 104-120: Dans la boucle qui appelle upsert_genre avant l’insertion
dans track_genre, ignore les conflits sur la clé (track_id, genre_id) afin que
les genres ayant le même identifiant canonique ne fassent pas échouer la
transaction. Applique le même changement à l’insertion correspondante dans
apply.rs.

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Reviewing files that changed from the base of the PR and between 7d00fb4 and 8fbd3f1.

Files selected for processing: 22

• src/catalog.rs
• src/catalog/apply.rs
• src/catalog/availability.rs
• src/catalog/credits.rs
• src/catalog/derivations.rs
• src/catalog/identity.rs
• src/catalog/libraries.rs
• src/catalog/mod.rs
• src/catalog/overrides.rs
• src/catalog/scan_jobs.rs
• src/catalog/tests.rs
• src/catalog/tracks.rs
• src/database.rs
• src/database/accounts.rs
• src/database/keys.rs
• src/database/libraries.rs
• src/database/metadata.rs
• src/database/mod.rs
• src/database/sessions.rs
• src/database/subsonic_credentials.rs
• src/database/sync_operations.rs
• src/database/tests.rs

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