feat(stats): add episodes completed and anime completed to tracking snapshot

- Query watched videos count and anime with all episodes watched
- Display in overview tracking snapshot
- Remove efficiency section from trends

stats/src/types/stats.ts

@@ -91,6 +91,8 @@ export interface OverviewData {
     activeSessions: number;
     episodesToday: number;
     activeAnimeCount: number;
+    totalEpisodesWatched: number;
+    totalAnimeCompleted: number;
   };
 }