Refactor processors and add LPR postprocessing (#16722)

* recordings data pub/sub

* function to process recording stream frames

* model runner

* lpr model runner

* refactor to mixin class and use model runner

* separate out realtime and post processors

* move model and mixin folders

* basic postprocessor

* clean up

* docs

* postprocessing logic

* clean up

* return none if recordings are disabled

* run postprocessor handle_requests too

* tweak expansion

* add put endpoint

* postprocessor tweaks with endpoint

frigate/embeddings/__init__.py

@@ -17,7 +17,7 @@ from frigate.config import FrigateConfig
 from frigate.const import CONFIG_DIR, FACE_DIR
 from frigate.data_processing.types import DataProcessorMetrics
 from frigate.db.sqlitevecq import SqliteVecQueueDatabase
-from frigate.models import Event
+from frigate.models import Event, Recordings
 from frigate.util.builtin import serialize
 from frigate.util.services import listen
 
@@ -55,7 +55,7 @@ def manage_embeddings(config: FrigateConfig, metrics: DataProcessorMetrics) -> N
         timeout=max(60, 10 * len([c for c in config.cameras.values() if c.enabled])),
         load_vec_extension=True,
     )
-    models = [Event]
+    models = [Event, Recordings]
     db.bind(models)
 
     maintainer = EmbeddingMaintainer(
@@ -234,3 +234,8 @@ class EmbeddingsContext:
             EmbeddingsRequestEnum.embed_description.value,
             {"id": event_id, "description": description},
         )
+
+    def reprocess_plate(self, event: dict[str, any]) -> dict[str, any]:
+        return self.requestor.send_data(
+            EmbeddingsRequestEnum.reprocess_plate.value, {"event": event}
+        )