The one-off cleanup merged ~13.5k same-video-different-title dupes, but they regrow as
these sibling tubes re-ingest under new titles. Wire the asset-id+duration merge into
the scheduler (every 12h, GOON_SCHED_THUMB_DEDUP_HOURS, 0=off) so it stays clean.
Shared logic lives in app/scheduler/thumb_dedup.py (run_thumb_asset_dedup); the one-shot
script now imports it. Same tight signature as the cleanup: family hosts only + identical
duration (the bare asset-id number is reused across unrelated CDNs, so cross-host/diff-
duration grouping is excluded). Reports 205b17d9 / 5a2944cb.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
