Fix:bug fix (#12423)

### What problem does this PR solve?
change: 
initialize webhook configuration in webhook function
remove debug print statement from airtable_connector
remove redundant uuid import in imap_connector

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/sdk/agents.py

@@ -162,6 +162,7 @@ async def webhook(agent_id: str):
         return get_data_error_result(code=RetCode.BAD_REQUEST,message="Invalid DSL format."),RetCode.BAD_REQUEST
 
     # 4. Check webhook configuration in DSL
+    webhook_cfg = {}
     components = dsl.get("components", {})
     for k, _ in components.items():
         cpn_obj = components[k]["obj"]