Addresses 'says running but I see nothing':
- Real logs: 'enriching <ch>…', 'proxy returned N', 'done — N proxy + N
per-video (X/Y dated)' so you can see exactly what it's doing.
- Proxy timeout 8s→4s so dead instances (most public ones) fail fast instead of
hanging ~40s before the yt-dlp fallback.
- Channel page now re-fetches a few times (25/60/110s) after load while videos
are still undated, re-rendering only when NEW year-seasons appear — so dates
the background enricher fills in pop in without a manual reload.
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