chore(typing): reduce ty excludes for A1 (#31721)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/app.py

@@ -1,4 +1,12 @@
+from __future__ import annotations
+
 import sys
+from typing import TYPE_CHECKING, cast
+
+if TYPE_CHECKING:
+    from celery import Celery
+
+    celery: Celery
 
 
 def is_db_command() -> bool:
@@ -23,7 +31,7 @@ else:
     from app_factory import create_app
 
     app = create_app()
-    celery = app.extensions["celery"]
+    celery = cast("Celery", app.extensions["celery"])
 
 if __name__ == "__main__":
     app.run(host="0.0.0.0", port=5001)