feat: EOD 23:15 seal + midnight seed shell for video/fans

Move daily snapshot/fans to 23:15 and add 00:01 seed that clones
last_completed ok=1 rows into today without advancing completed.
Evening runs force through seed markers; growth previous is per-aid
adjacent. Home shows short-update clock + 全站数据 date, and 收录视频
counts.

config.docker.example.json

@@ -63,7 +63,8 @@
   ],
   "schedule": {
     "discover_minutes": 60,
-    "snapshot_at": "00:01",
+    "snapshot_at": "23:15",
+    "seed_at": "00:01",
     "candidate_ttl_days": 7,
     "recent_snapshot_minutes": 60,
     "recent_video_days": 2