Add MQTT publish request and response models, and implement publish route

- Introduced MQTTPublishRequest and MQTTPublishResponse models for handling MQTT message publishing.
- Implemented a new POST route for publishing MQTT messages, including error handling and logging.
- Enhanced the StandaloneAutoRecorder with improved logging during manual recording start.
- Updated the frontend to include an MQTT Debug Panel for better monitoring and debugging capabilities.

camera-management-api/usda_vision_system/recording/standalone_auto_recorder.py

@@ -249,19 +249,30 @@ class StandaloneAutoRecorder:
                 self.logger.info(f"📹 AUTO-RECORDER: Starting recording with settings - Exposure: {camera_config.exposure_ms}ms, Gain: {camera_config.gain}, FPS: {camera_config.target_fps}")
 
                 # Use camera manager to start recording with camera's default settings
-                success = self.camera_manager.manual_start_recording(
-                    camera_name=camera_name,
-                    filename=filename,
-                    exposure_ms=camera_config.exposure_ms if camera_config else None,
-                    gain=camera_config.gain if camera_config else None,
-                    fps=camera_config.target_fps if camera_config else None
-                )
+                self.logger.info(f"📹 AUTO-RECORDER: Calling manual_start_recording for {camera_name} with filename: {filename}")
+                try:
+                    success = self.camera_manager.manual_start_recording(
+                        camera_name=camera_name,
+                        filename=filename,
+                        exposure_ms=camera_config.exposure_ms if camera_config else None,
+                        gain=camera_config.gain if camera_config else None,
+                        fps=camera_config.target_fps if camera_config else None
+                    )
+                    self.logger.info(f"📹 AUTO-RECORDER: manual_start_recording returned: {success}")
+                except Exception as e:
+                    self.logger.error(f"❌ AUTO-RECORDER: Exception calling manual_start_recording: {e}", exc_info=True)
+                    success = False
 
                 if success:
                     self.logger.info(f"✅ AUTO-RECORDER: Successfully started auto-recording: {camera_name} -> {filename}")
                     self.active_recordings[camera_name] = filename
                 else:
                     self.logger.error(f"❌ AUTO-RECORDER: Failed to start auto-recording for camera {camera_name} (manual_start_recording returned False)")
+                    # Check camera status for more details
+                    if self.state_manager:
+                        camera_info = self.state_manager.get_camera_status(camera_name)
+                        if camera_info:
+                            self.logger.error(f"❌ AUTO-RECORDER: Camera status - is_recording: {camera_info.is_recording}, state: {camera_info.state}")
             else:
                 # Standalone mode - use own recorder
                 recorder = self._get_camera_recorder(camera_name)