Fourth service. Rides the YouTube-video enrich path (like RYD/SponsorBlock), keyless,
on by default → toggle in the YouTube-Extras frame.
- DeArrowWorker: fetches the branding API and stores the first non-original crowd
title for a cached YouTube video. apply_youtube_dearrow + youtube_video_dearrow_title
DB methods; dearrow_status added to the youtube_enrich next/breakdown whitelists.
- Schema: dearrow_title/status/attempted on youtube_video_stats (video_schema.sql +
_COLUMN_MIGRATIONS for existing DBs).
- config GET/POST dearrow_enabled; manager orb (blue 🏹, video-kind) + status poll;
YT video-detail panel shows a 'DeArrow' alt-title (payload via youtube.py + CSS).
- 4 new tests + fixed-set/config assertions.
30 backfill tests green. (My change is ruff-clean; the 12 pre-existing S110s in
api/video/youtube.py are unrelated tech debt on this branch, left untouched.)
c33810f39f