style: move import os to module level, fix import ordering

litellm/proxy/guardrails/guardrail_endpoints.py

@@ -5,14 +5,15 @@ CRUD ENDPOINTS FOR GUARDRAILS
 import concurrent.futures
 import inspect
 import json
+import os
 from datetime import datetime, timezone
 from typing import Any, Dict, List, Optional, Type, TypeVar, Union, cast
 from urllib.parse import urlparse
 
 from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
 
 from litellm.proxy.common_utils.path_utils import safe_join
-from pydantic import BaseModel
 
 from litellm._logging import verbose_proxy_logger
 from litellm.constants import DEFAULT_MAX_RECURSE_DEPTH
@@ -1350,8 +1351,6 @@ async def get_category_yaml(category_name: str):
     Returns:
         The raw YAML or JSON content of the category file with file type indicator
     """
-    import os
-
     # Get the categories directory path
     categories_dir = os.path.join(
         os.path.dirname(__file__),
@@ -1408,8 +1407,6 @@ async def get_major_airlines():
     Get the major airlines list from IATA (competitor intent, airline type).
     Returns airline id, match variants (pipe-separated), and tags.
     """
-    import os
-
     airlines_path = os.path.join(
         os.path.dirname(__file__),
         "guardrail_hooks",