Add:User stats API for year stats

server/Database.js

@@ -122,11 +122,16 @@ class Database {
     return this.models.feed
   }
 
-  /** @type {typeof import('./models/Feed')} */
+  /** @type {typeof import('./models/FeedEpisode')} */
   get feedEpisodeModel() {
     return this.models.feedEpisode
   }
 
+  /** @type {typeof import('./models/PlaybackSession')} */
+  get playbackSessionModel() {
+    return this.models.playbackSession
+  }
+
   /**
    * Check if db file exists
    * @returns {boolean}