fix(db): tx_age_sweep flaky test race (#926)#975
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Commit-early sweep: implementer leg ended without committing (build-lane contention). Local gates deferred to CI. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…ky tx-age sweep run_writer_task registers a writer_task_tx handle in the process-wide tx_registry singleton; the checkpoint tx_age_sweep_* tests read that singleton under #[serial(tx_registry)]. The writer_task.rs tests that spawn a writer task were missing from the group, leaking a longer-lived writer_task_tx into the sweep's oldest() read and intermittently failing the assertion on main CI. Join them to the serial group. No prod change.
Merge main and drop implementation_notes.md, a stray process-notes file that does not belong in the source tree.
# Conflicts: # crates/khive-db/src/checkpoint.rs
oceanwaves630
approved these changes
Jul 14, 2026
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Addresses #926 — tx_age_sweep_names_long_lived_reader_pinning_wal_past_high_water races concurrently registered tx entries.
Implementer leg completed the change but stalled before commit (shared build-lane contention); swept and pushed by the lane owner. Local gates deferred to CI; codex review follows.
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