Address review feedback (@marcelklehr, Copilot):
- lockTask claims only SCHEDULED tasks (was status != RUNNING) and stamps
started_at in the same atomic UPDATE, so a finished task cannot be re-claimed
and the external-provider claim path records started_at as well.
- claimWithBoundedRetry re-reads after lockTask instead of a follow-up UPDATE.
- Oracle joins SQLite on the bounded-retry fallback: Oracle cannot combine a
row-limiting clause with FOR UPDATE (ORA-02014), which failed the claim tests
on Oracle CI.
- Reword the worker docblock/comments to "prefer oldest available" (parallel
SKIP LOCKED does not guarantee a strict global order).
- Add a regression test that lockTask does not resurrect a finished task.
Signed-off-by: Yoan Bozhilov <bygadd@gmail.com>
Assisted-by: Claude Code:claude-opus-4-8
Replace the worker retry/ignore-list claim-loop with a single atomic
SELECT ... FOR UPDATE SKIP LOCKED claim (SQLite bounded-retry fallback),
preserving the no-duplicate guarantee while removing the thundering-herd
contention that throttled backlog draining. Add a (status,type,last_updated)
index via the table-creating migration + db:add-missing-indices listener.
Signed-off-by: Yoan Bozhilov <bygadd@gmail.com>
Assisted-by: Claude Code:claude-opus-4-8
