refactor(api): switch to dify_config with Pydantic in controllers and schedule (#6237)

api/controllers/web/app.py

@@ -1,6 +1,6 @@
-from flask import current_app
 from flask_restful import fields, marshal_with
 
+from configs import dify_config
 from controllers.web import api
 from controllers.web.error import AppUnavailableError
 from controllers.web.wraps import WebApiResource
@@ -75,7 +75,7 @@ class AppParameterApi(WebApiResource):
                 "transfer_methods": ["remote_url", "local_file"]
             }}),
             'system_parameters': {
-                'image_file_size_limit': current_app.config.get('UPLOAD_IMAGE_FILE_SIZE_LIMIT')
+                'image_file_size_limit': dify_config.UPLOAD_IMAGE_FILE_SIZE_LIMIT
             }
         }