[Chore/Refactor] Improve type checking configuration (#25185)

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

api/app_factory.py

@@ -25,6 +25,9 @@ def create_flask_app_with_configs() -> DifyApp:
         # add an unique identifier to each request
         RecyclableContextVar.increment_thread_recycles()
 
+    # Capture the decorator's return value to avoid pyright reportUnusedFunction
+    _ = before_request
+
     return dify_app