fix: import verbose_proxy_logger to resolve undefined name errors

Author: mubashir1osmani

enterprise/litellm_enterprise/proxy/guardrails/endpoints.py

@@ -13,6 +13,7 @@
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel
 
+from litellm._logging import verbose_proxy_logger
 from litellm.integrations.custom_guardrail import CustomGuardrail
 from litellm.proxy._types import UserAPIKeyAuth
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth