The global source monitor can't catch a single stalled tube because every tube scraper shares one Source row (tube-scraper), so an aggregate run still reports success while one origin freezes (freshporno browsing the rotating KVS homepage root, report 14f3a655). New watchdog checks max(created_at) per active browse-scraper origin (tube:<sitetag>); if a tube with history hasn't produced a new scene in > max_age_hours it fires a Sentry message with a stable per-origin fingerprint (age in extras, not the title, so it stays one grouped issue). Runs every 6h, 48h threshold, both env-tunable (GOON_SCHED_INGEST_WATCHDOG_HOURS / GOON_INGEST_WATCHDOG_MAX_AGE_HOURS). Verified: 0 stale at 48h post-fix, detects neporn at a strict 12h threshold.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
