- Fixes 'stuck idle': a channel marked enriched with FEW dates (proxies were
down) was locked out for 24h, so the improved yt-dlp fallback never re-ran.
channel_dates_enriched_recently now retries in 15 min when the last run got
<15 dates, and skips 24h only after a good run. So the catalog actually fills
in once a source works.
- The YouTube Dates worker now appears in the Manage Workers modal: added to
WORKERS (red ▶), youtube-aware rail subtitle, and a dedicated simple panel
(status + what-it-does + channels-enriched / dates-cached / queued counts) —
no per-kind match queue. Pause/resume works; polls every 3s like the rail.
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