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/models.py

@@ -1,6 +1,8 @@
 from peewee import (
+    BlobField,
     BooleanField,
     CharField,
+    CompositeKey,
     DateTimeField,
     FloatField,
     ForeignKeyField,
@@ -132,3 +134,18 @@ class User(Model):  # type: ignore[misc]
     )
     password_hash = CharField(null=False, max_length=120)
     notification_tokens = JSONField()
+
+
+class Trigger(Model):  # type: ignore[misc]
+    camera = CharField(max_length=20)
+    name = CharField()
+    type = CharField(max_length=10)
+    data = TextField()
+    threshold = FloatField()
+    model = CharField(max_length=30)
+    embedding = BlobField()
+    triggering_event_id = CharField(max_length=30)
+    last_triggered = DateTimeField()
+
+    class Meta:
+        primary_key = CompositeKey("camera", "name")