Fast restart (#5378)

* dont wait so long for queues

* implement stop methods for comms

* set the detection events on exit and return early from processing

* handle the stop event in the broadcast threads

* short circuit the detection process exit code if it already exited

* some logging for stats thread

* just keep the log process alive 1 second after the last log message

* ensure the multiprocessing queues are emptied and closed

* Update frigate/log.py

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* Update frigate/log.py

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* mypy fixes

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

frigate/comms/mqtt.py

@@ -35,6 +35,9 @@ class MqttClient(Communicator):  # type: ignore[misc]
             f"{self.mqtt_config.topic_prefix}/{topic}", payload, retain=retain
         )
 
+    def stop(self) -> None:
+        self.client.disconnect()
+
     def _set_initial_topics(self) -> None:
         """Set initial state topics."""
         for camera_name, camera in self.config.cameras.items():