Add ability to restrict genai to objects and zones at the camera level (#13958)

* Add ability to restrict genai to labels and zones at the camera level

* fix comment

* clarify docs

* use objects instead of labels

* docs

* object list

frigate/embeddings/maintainer.py

@@ -127,6 +127,14 @@ class EmbeddingMaintainer(threading.Thread):
                     camera_config.genai.enabled
                     and self.genai_client is not None
                     and event.data.get("description") is None
+                    and (
+                        camera_config.genai.objects is None
+                        or event.label in camera_config.genai.objects
+                    )
+                    and (
+                        camera_config.genai.required_zones is None
+                        or set(event.zones) & set(camera_config.genai.required_zones)
+                    )
                 ):
                     # Generate the description. Call happens in a thread since it is network bound.
                     threading.Thread(