fix: ruff import organization in server.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/api_keys.py

@@ -10,12 +10,12 @@ import json
 import logging
 import os
 import secrets
-
-import bcrypt
 from dataclasses import asdict, dataclass
 from datetime import datetime, timedelta
 from pathlib import Path
 
+import bcrypt
+
 logger = logging.getLogger(__name__)