Fix: Register SpotifyTrackMatchingService as singleton for DI

- Register as singleton first, then as hosted service
- Allows AdminController to inject and trigger matching manually
- Added better logging for Jellyfin playlist fetch failures
- Logs when JellyfinId is missing or API calls fail
- Helps debug '0 local / 0 missing' issue

allstarr/Controllers/AdminController.cs

@@ -205,6 +205,8 @@ public class AdminController : ControllerBase
                     var request = new HttpRequestMessage(HttpMethod.Get, url);
                     request.Headers.Add("X-Emby-Authorization", GetJellyfinAuthHeader());
                     
+                    _logger.LogDebug("Fetching Jellyfin playlist items for {Name} from {Url}", config.Name, url);
+                    
                     var response = await _jellyfinHttpClient.SendAsync(request);
                     if (response.IsSuccessStatusCode)
                     {
@@ -216,7 +218,18 @@ public class AdminController : ControllerBase
                             var localCount = items.GetArrayLength();
                             playlistInfo["localTracks"] = localCount;
                             playlistInfo["externalTracks"] = Math.Max(0, spotifyTrackCount - localCount);
+                            _logger.LogDebug("Playlist {Name}: {Local} local tracks, {Missing} missing", 
+                                config.Name, localCount, spotifyTrackCount - localCount);
                         }
+                        else
+                        {
+                            _logger.LogWarning("No Items property in Jellyfin response for {Name}", config.Name);
+                        }
+                    }
+                    else
+                    {
+                        _logger.LogWarning("Failed to get Jellyfin playlist {Name}: {StatusCode}", 
+                            config.Name, response.StatusCode);
                     }
                 }
                 catch (Exception ex)
@@ -224,6 +237,10 @@ public class AdminController : ControllerBase
                     _logger.LogWarning(ex, "Failed to get Jellyfin playlist tracks for {Name}", config.Name);
                 }
             }
+            else
+            {
+                _logger.LogWarning("Playlist {Name} has no JellyfinId configured", config.Name);
+            }
             
             playlists.Add(playlistInfo);
         }