Update camera management and MQTT logging for improved functionality

- Changed log level in configuration from WARNING to INFO for better visibility of system operations.
- Enhanced StandaloneAutoRecorder initialization to accept camera manager, state manager, and event system for improved modularity.
- Updated recording routes to handle optional request bodies and improved error logging for better debugging.
- Added checks in CameraMonitor to determine if a camera is already in use before initialization, enhancing resource management.
- Improved MQTT client logging to provide more detailed connection and message handling information.
- Added new MQTT event handling capabilities to the VisionApiClient for better tracking of machine states.

camera-management-api/usda_vision_system/mqtt/handlers.py

@@ -31,10 +31,11 @@ class MQTTMessageHandler:
             self.message_count += 1
             self.last_message_time = datetime.now()
 
-            self.logger.info(f"Processing MQTT message - Machine: {machine_name}, Topic: {topic}, Payload: {payload}")
+            self.logger.info(f"📡 Processing MQTT message - Machine: {machine_name}, Topic: {topic}, Payload: '{payload}'")
 
             # Normalize payload
             normalized_payload = self._normalize_payload(payload)
+            self.logger.info(f"📡 Normalized payload '{payload}' -> '{normalized_payload}' for machine {machine_name}")
 
             # Update machine state
             state_changed = self.state_manager.update_machine_state(name=machine_name, state=normalized_payload, message=payload, topic=topic)
@@ -44,9 +45,12 @@ class MQTTMessageHandler:
 
             # Publish state change event if state actually changed
             if state_changed:
+                self.logger.info(f"📡 MQTT: Machine {machine_name} state changed to: {normalized_payload}")
+                self.logger.info(f"📡 Publishing MACHINE_STATE_CHANGED event for {machine_name} -> {normalized_payload}")
                 publish_machine_state_changed(machine_name=machine_name, state=normalized_payload, source="mqtt_handler")
-
-                self.logger.info(f"Machine {machine_name} state changed to: {normalized_payload}")
+                self.logger.info(f"✅ Published MACHINE_STATE_CHANGED event for {machine_name} -> {normalized_payload}")
+            else:
+                self.logger.info(f"📡 Machine {machine_name} state unchanged (still {normalized_payload}) - no event published")
 
             # Log the message for debugging
             self._log_message_details(machine_name, topic, payload, normalized_payload)