Prioritize local Jellyfin lyrics over LRCLib in prefetch

- Check for embedded lyrics in local Jellyfin tracks before fetching from LRCLib
- Remove previously cached LRCLib lyrics when local lyrics are found
- Prevents unnecessary API calls and respects user's embedded lyrics
- Tracks with local lyrics are counted as 'cached' in prefetch stats

allstarr/Controllers/AdminController.cs

@@ -732,7 +732,9 @@ public class AdminController : ControllerBase
                                 }
                             }
                             
-                            // Check lyrics status
+                            // Check lyrics status (only from our cache - lrclib/Spotify)
+                            // Note: For local tracks, Jellyfin may have embedded lyrics that we don't check here
+                            // Those will be served directly by Jellyfin when requested
                             var cacheKey = $"lyrics:{track.PrimaryArtist}:{track.Title}:{track.Album}:{track.DurationMs / 1000}";
                             var existingLyrics = await _cache.GetStringAsync(cacheKey);
                             var hasLyrics = !string.IsNullOrEmpty(existingLyrics);