Pass timestamp metadata to frame writer

Update the recording queue consumer to unpack `timestamp_metadata` from each frame item and forward it to `_write_frame_now`. This keeps queued frame payload handling aligned with the expanded tuple format and preserves metadata during recording.

Author: C-Achard

dlclivegui/gui/recording_manager.py

@@ -149,8 +149,8 @@ def _dispatch_loop(self) -> None:
                 if item is _FRAME_SENTINEL:
                     break
 
-                cam_id, frame, timestamp = item
-                self._write_frame_now(cam_id, frame, timestamp)
+                cam_id, frame, timestamp, timestamp_metadata = item
+                self._write_frame_now(cam_id, frame, timestamp, timestamp_metadata)
 
             finally:
                 try: