feat: improve polling recovery and session cleanup

src/LiveRecorder.Infrastructure/Services/FfmpegService.cs

@@ -31,15 +31,18 @@ public sealed partial class FfmpegService : IFfmpegService
     private int _maxConcurrentTranscodeTasks = 1;
     private readonly IServiceScopeFactory _serviceScopeFactory;
     private readonly IStorageGuardService _storageGuardService;
+    private readonly ILiveRoomPollingSignal _liveRoomPollingSignal;
     private readonly ILogger<FfmpegService> _logger;
 
     public FfmpegService(
         IServiceScopeFactory serviceScopeFactory,
         IStorageGuardService storageGuardService,
+        ILiveRoomPollingSignal liveRoomPollingSignal,
         ILogger<FfmpegService> logger)
     {
         _serviceScopeFactory = serviceScopeFactory;
         _storageGuardService = storageGuardService;
+        _liveRoomPollingSignal = liveRoomPollingSignal;
         _logger = logger;
     }