The 2026-08-14 incident (t_20e23f84): 4 recurring no_agent interval jobs
EAGAIN-failed at 12:50 and recorded ZERO executions for ~1h47m, surviving a
gateway restart, cleared only by operator `cron resume` / force-run. The
in-memory stale-claim sweep (t_3778a491, already on origin/main) heals a
leaked `_running_job_ids` claim in-process, but a recurring job whose
PERSISTED state shows last_status=error and whose next_run_at was re-armed
into the future by mark_job_run is invisible to that sweep: it is not in the
running set and not due, so it just sits — the restart-surviving half.
cron/jobs.py::_get_due_jobs_locked now re-arms such a recurring job to
next_run_at=now when all hold: persisted last_status==error, last_run_at older
than cadence+grace (so it is a real wedge, not a normal transient-error retry),
next_run_at in the future, and not running in this process. The scheduler then
re-dispatches it on the next tick without force-run/resume. Logs
cron.persisted_error.recovered, bumps a probe-visible counter, appends a JSONL
row. Within-cadence errors are never force-re-armed.
Tests: tests/cron/test_recurring_persisted_error_recovery.py (clean behavioral
RED on unfixed main / GREEN here; 2 consecutive auto-fires; within-cadence not
re-armed). Full tests/cron/: 713 passed, 1 skipped.
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