refactor: strip obvious comments

lib/database/app_database.dart

@@ -38,7 +38,6 @@ enum OfflineActionType {
   };
 }
 
-// Simplified database with API cache for offline support
 @DriftDatabase(
   tables: [
     DownloadedMedia,
@@ -556,7 +555,6 @@ LazyDatabase _openConnection() {
 
     final file = File(p.join(dbFolder.path, 'plezy_downloads.db'));
 
-    // Ensure directory exists
     if (!await file.parent.exists()) {
       await file.parent.create(recursive: true);
     }

lib/database/download_operations.dart

@@ -123,7 +123,6 @@ extension DownloadDatabaseOperations on AppDatabase {
   /// Get next item from queue (highest priority, oldest first)
   /// Only returns items that are not paused
   Future<DownloadQueueItem?> getNextQueueItem() async {
-    // Join with downloadedMedia to check status and filter out paused items
     final query = select(
       downloadQueue,
     ).join([innerJoin(downloadedMedia, downloadedMedia.globalKey.equalsExp(downloadQueue.mediaGlobalKey))]);

lib/database/tables.dart

@@ -7,7 +7,6 @@ class ApiCache extends Table {
   /// for Plex, "abc123:/Users/.../Items/..." for Jellyfin)
   TextColumn get cacheKey => text()();
 
-  /// JSON response data
   TextColumn get data => text()();
 
   /// Whether this item is pinned for offline access