Track encoding errors with writer_timing

Fix the video encoding error path in VideoRecorder by replacing _process_timing with _writer_timing so encoding failures are recorded and logged against the correct timing object. This ensures error timing and maybe_log are invoked on the writer timing tracker rather than the wrong object.

Author: C-Achard

dlclivegui/services/video_recorder.py

@@ -387,8 +387,8 @@ def _writer_loop(self) -> None:
                                 self._encode_error = exc
                             logger.exception("Video encoding failed while writing frame", exc_info=exc)
                             self._stop_event.set()
-                            self._process_timing.note_error()
-                            self._process_timing.maybe_log()
+                            self._writer_timing.note_error()
+                            self._writer_timing.maybe_log()
                             break
                         else:
                             elapsed = time.perf_counter() - start