Embeddings fixes (#14269)

* Add debugging logs for more info

* Improve timeout handling

* Fix event cleanup

* Handle zmq error and empty data

* Don't run download

* Remove unneeded embeddings creations

* Update timouts

* Init models immediately

* Fix order of init

* Cleanup

frigate/comms/dispatcher.py

@@ -64,6 +64,9 @@ class Dispatcher:
         self.onvif = onvif
         self.ptz_metrics = ptz_metrics
         self.comms = communicators
+        self.camera_activity = {}
+        self.model_state = {}
+        self.embeddings_reindex = {}
 
         self._camera_settings_handlers: dict[str, Callable] = {
             "audio": self._on_audio_command,
@@ -85,10 +88,6 @@ class Dispatcher:
         for comm in self.comms:
             comm.subscribe(self._receive)
 
-        self.camera_activity = {}
-        self.model_state = {}
-        self.embeddings_reindex = {}
-
     def _receive(self, topic: str, payload: str) -> Optional[Any]:
         """Handle receiving of payload from communicators."""