reap_terminal_workers signalled any retained worker on the first tick after
its run closed, but a healthy worker is still alive for a moment after
kanban_complete / kanban_request_review returns (final assistant turn,
session persistence), so slow-but-healthy workers were killed mid-finalisation
and logged as terminal_worker_reaped. Reap only runs whose ended_at is at
least TERMINAL_WORKER_REAP_GRACE_SECONDS (120 s, two default ticks) old;
the fingerprint check is unchanged. Each row is now handled on its own so a
signal or /proc failure on one run is logged and skips only that run.
Tests: a just-closed run is not signalled and keeps its evidence, then is
reaped once the grace has passed (red before); one raising row no longer
aborts the sweep for the others (red before).
teknium1
bd63866253