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

api/controllers/service_api/index.py

@@ -1,6 +1,6 @@
-from flask import current_app
 from flask_restful import Resource
 
+from configs import dify_config
 from controllers.service_api import api
 
 
@@ -9,7 +9,7 @@ class IndexApi(Resource):
         return {
             "welcome": "Dify OpenAPI",
             "api_version": "v1",
-            "server_version": current_app.config['CURRENT_VERSION']
+            "server_version": dify_config.CURRENT_VERSION,
         }