refactor(utils): tidy imports and update public-ip cache path in get_public_ip

- Reorder and simplify imports (group stdlib imports, tighten typing to `Any`/`Dict`).
- Replace `tempfile` usage and adjust import ordering for clarity.
- Change `FileCache`/`send_query` import order to `QueryResult, send_query`.
- Update cache directory path from "/tmp/runners/public-ip" to "/tmp/caches/public-ip".
- Minor whitespace and formatting cleanups.

This is a non-functional refactor that improves code organization and standardizes the temporary cache location.

Author: dimaslanjaka

proxy_checker/utils/get_public_ip.py

@@ -1,12 +1,10 @@
-import os
-import json
-import time
 import hashlib
+import json
+import os
 import re
-import tempfile
-from typing import Optional, Dict, Any, List
-from .curl import send_query, QueryResult
-
+import time
+from typing import Any, Dict
+from .curl import QueryResult, send_query
 
 IP_REGEX = re.compile(
     r"(?!0)(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}"
@@ -35,7 +33,7 @@ def get_public_ip(
 ) -> str:
 
     # ------------ CACHE HANDLING ------------
-    cache_dir = os.path.join("/tmp", "runners", "public-ip")
+    cache_dir = os.path.join("/tmp/caches/public-ip")
     os.makedirs(cache_dir, exist_ok=True)
 
     proxy_key = (