devlog: wp1-wp5 disposition records for the owner backlog closeout

[lidge-jun]

Summary

Docs-only. Lands the per-item disposition records for the first five work-phases
of the owner backlog closeout, under
devlog/_plan/260823_owner_backlog_closeout/.

Doc	Item	Outcome
010	PR #2439 contract manifest	merged 2a2f6e68f
020	PR #2437 + issue #2436	merged 81474259e, issue closed
030	PR #2435 + issue #2434	merged 4fb0fbe7b, issue closed
040	PR #2433 combo failover	held on a reviewer FAIL
050	PR #2387 + issue #2378	merged b6c7c0afe, issue closed

Each record carries the reviewer's verdict, the exact focused test command with
its counts, and the merge SHA or the reason for the hold.

040 is the one worth reading: #2433 has green tests and green CI and still
should not land, because its preflight double-records a failed terminal against
the passthrough inspectors, so one 502 counts as two account failures.

Verification

Docs-only; nothing in the build, typecheck, or test path reads from devlog/.
The hygiene gate that does read it stays green:

bun test tests/repo-hygiene.test.ts
 11 pass, 0 fail

Checklist

• Targets dev
• Scoped to one logical unit
• No runtime behavior change
• No credentials, request bodies, or account identifiers
• Decade-numbered devlog naming

Summary by CodeRabbit

• Documentation
  • Added closeout records for six completed work items, including review decisions, validation results, merge status, and issue closure details.
  • Documented compatibility, history handling, import-boundary, process-state, and provider-validation work.
  • Recorded a combo failover change that remains open due to duplicate failure reporting and pending corrective work.

[github-actions]

✅ Deterministic PR hygiene checks passed.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 16033dbd-80fb-48b1-a36f-6abaddf66ae1

📥 Commits

Reviewing files that changed from the base of the PR and between aa37c8b and 97be30e.

📒 Files selected for processing (6)

• devlog/_plan/260823_owner_backlog_closeout/010_wp1_pr2439_contract_manifest.md
• devlog/_plan/260823_owner_backlog_closeout/020_wp2_pr2437_history_manifest.md
• devlog/_plan/260823_owner_backlog_closeout/030_wp3_pr2435_fetch_helper_boundary.md
• devlog/_plan/260823_owner_backlog_closeout/040_wp4_pr2433_combo_failover.md
• devlog/_plan/260823_owner_backlog_closeout/050_wp5_pr2387_process_state.md
• devlog/_plan/260823_owner_backlog_closeout/060_wp6_pr2380_provider_validation.md

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📝 Walkthrough

Walkthrough

The PR adds six owner-backlog closeout records. Five document completed compatibility or boundary changes with verification and merge details. One records a rejected combo failover change caused by duplicate terminal-failure accounting and a pending remediation.

Changes

Owner backlog closeout

Layer / File(s)	Summary
Completed compatibility and boundary closeouts devlog/_plan/260823_owner_backlog_closeout/010_wp1_pr2439_contract_manifest.md, 020_wp2_pr2437_history_manifest.md, 030_wp3_pr2435_fetch_helper_boundary.md, 050_wp5_pr2387_process_state.md, 060_wp6_pr2380_provider_validation.md	Adds closeout records for five completed work items. The records capture scope, review verdicts, test or CI results, boundary and compatibility checks, merge dispositions, and issue-closure details.
Combo failover hold record devlog/_plan/260823_owner_backlog_closeout/040_wp4_pr2433_combo_failover.md	Adds a closeout record for the rejected combo zero-output failover change. It documents duplicate terminal-failure accounting and the hold pending a shared exactly-once recorder and regression coverage.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: ingwannu

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/wp1-5-records

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