fix mypy errors from types-peewee 4.0 (#24323)

types-peewee 4.0 types model fields precisely, so 17 `type: ignore` comments and 2 `cast(str, ...)` calls are no longer needed. Its stubs type `.namedtuples()` and `.dicts()` queries as returning model instances, so the review cleanup reads namedtuple fields by name and the storage usage query casts its dict rows. `start_time` is declared `DateTimeField` but stores unix timestamps, so two reads cast it like `debug_replay.py` already does. `Export` gets an annotation for the `export_case_id` attribute peewee adds at runtime.

frigate/data_processing/post/review_descriptions.py

@@ -8,7 +8,7 @@ import os
 import shutil
 import threading
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 import cv2
 from peewee import DoesNotExist
@@ -528,7 +528,8 @@ class ReviewDescriptionProcessor(PostProcessorApi):
                     .get()
                 )
 
-                time_in_segment = ts - recording.start_time
+                # start_time is a DateTimeField holding a unix timestamp
+                time_in_segment = ts - cast(float, recording.start_time)
                 return get_image_from_recording(
                     self.config.ffmpeg,
                     recording.path,