Harden the cherry-picked fix (#42858, credit @PINKIIILQWQ; #100613 by
@moon2sun covers the same gap) per the sweeper review on #42858:
- Snapshot status/pid/claim INSIDE the archive txn so the kill only
happens when this caller wins the archive transition; a losing
concurrent archiver returns False without signalling anything.
- Signal only tasks that were actually running (never-claimed tasks
skip the no-op helper call entirely).
- Kill runs post-commit: _poll_worker_exit can block ~5s and must not
hold the SQLite write lock. Safe because archived is terminal — no
dispatcher can respawn off the released claim.
- Termination outcome lands as its own archive_worker_termination
event so the archived event stays atomic with the status flip.
- 2 invariant tests (running task -> signalled + audited; non-running
-> no signal, no event), live E2E: worker survived archive on main,
terminated (<0.3s, clean SIGTERM) with the fix.
Port trigger: lobehub PR scout; same bug class as lobehub#19220's
"failed verify cannot disarm the schedule" family (lifecycle actions
must reach the live process, not just the DB row).
Teknium
053f8b1b17