fix(analytics): shrink video efficiency and gate noisy boards by views

config.example.json

@@ -102,7 +102,8 @@
   "analytics": {
     "min_duration_seconds": 600,
     "maturity_days": 2,
-    "min_view_for_efficiency": 0,
+    "min_view_for_ranking": 2000,
+    "video_shrink_minutes": 60,
     "shrink_minutes": null
   }
 }