Add comment about only warning if thumbnail couldn't be marshalled

Author: ryanclark

lib/auth/recordingmetadata/recordingmetadatav1/recordingmetadata.go

@@ -166,6 +166,7 @@ func (s *RecordingMetadataService) ProcessSessionRecording(ctx context.Context,
 		}
 
 		if _, err := protodelim.MarshalTo(w, thumbnail); err != nil {
+			// log the error but continue processing other thumbnails and the session metadata (metadata is more important)
 			s.logger.WarnContext(ctx, "Failed to marshal thumbnail entry",
 				"session_id", sessionID, "error", err)
 		}