Processing refactor (#15935)

* Refactor post processor to be real time processor

* Build out generic API for post processing

* Cleanup

* Fix

frigate/types.py

@@ -2,13 +2,13 @@ from enum import Enum
 from typing import TypedDict
 
 from frigate.camera import CameraMetrics
+from frigate.data_processing.types import DataProcessorMetrics
 from frigate.object_detection import ObjectDetectProcess
-from frigate.postprocessing.types import PostProcessingMetrics
 
 
 class StatsTrackingTypes(TypedDict):
     camera_metrics: dict[str, CameraMetrics]
-    embeddings_metrics: PostProcessingMetrics | None
+    embeddings_metrics: DataProcessorMetrics | None
     detectors: dict[str, ObjectDetectProcess]
     started: int
     latest_frigate_version: str