Semantic Search Triggers (#18969)

* semantic trigger test

* database and model

* config

* embeddings maintainer and trigger post-processor

* api to create, edit, delete triggers

* frontend and i18n keys

* use thumbnail and description for trigger types

* image picker tweaks

* initial sync

* thumbnail file management

* clean up logs and use saved thumbnail on frontend

* publish mqtt messages

* webpush changes to enable trigger notifications

* add enabled switch

* add triggers from explore

* renaming and deletion fixes

* fix typing

* UI updates and add last triggering event time and link

* log exception instead of return in endpoint

* highlight entry in UI when triggered

* save and delete thumbnails directly

* remove alert action for now and add descriptions

* tweaks

* clean up

* fix types

* docs

* docs tweaks

* docs

* reuse enum

frigate/embeddings/__init__.py

@@ -296,3 +296,15 @@ class EmbeddingsContext:
         return self.requestor.send_data(
             EmbeddingsRequestEnum.transcribe_audio.value, {"event": event}
         )
+
+    def generate_description_embedding(self, text: str) -> None:
+        return self.requestor.send_data(
+            EmbeddingsRequestEnum.embed_description.value,
+            {"id": None, "description": text, "upsert": False},
+        )
+
+    def generate_image_embedding(self, event_id: str, thumbnail: bytes) -> None:
+        return self.requestor.send_data(
+            EmbeddingsRequestEnum.embed_thumbnail.value,
+            {"id": str(event_id), "thumbnail": str(thumbnail), "upsert": False},
+        )