Cleanup recordings

NostrStreamer/Services/Dvr/IDvrStore.cs

@@ -11,6 +11,13 @@ public interface IDvrStore
     /// <param name="source"></param>
     /// <returns></returns>
     Task<UploadResult> UploadRecording(UserStream stream, Uri source);
+
+    /// <summary>
+    /// Delete all recordings from the storage by stream
+    /// </summary>
+    /// <param name="stream"></param>
+    /// <returns>List of deleted recordings</returns>
+    Task<List<Guid>> DeleteRecordings(UserStream stream);
 }
 
 public record UploadResult(Uri Result, double Duration);