- worker.py: wrap the watchdog loop so a failure in it (e.g. a transient DB error in
_job_liveness) still hard-kills the child + fails the job, instead of leaving the child
running unsupervised — the exact wedge the feature prevents (#1).
- worker.py: _touch_job heartbeat bumps updated_at at each extraction attempt, so a slow /
multi-client-set fallback extraction (which writes no progress, and re-writes identical
values so ORM onupdate does not fire) is not false-killed as "stalled" (#2).
- edit.py: extract escalate_kill (terminate->wait->kill escalation); _stop and worker's
_stop_child (process-group variant) now share it (#3).
- worker.py: document the edit path's second, tighter run_ffmpeg watchdog and that the
supervisor is POSIX/Linux-container-only (#4, #6).
- tests: a long download stays alive while progress is fresh, and a watchdog-loop error
still stops the child (#1, #5).
peter
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