feat: MAINT-001 - Fix Ruff violations across all Python source

packages/gateway/meshnet_gateway/server.py

@@ -3,7 +3,6 @@
 import http.server
 import hashlib
 import json
-import os
 from collections import Counter
 from dataclasses import dataclass
 import threading
@@ -62,7 +61,7 @@ class _GatewayHTTPServer(http.server.HTTPServer):
 
 
 class _GatewayHandler(http.server.BaseHTTPRequestHandler):
-    def log_message(self, fmt, *args):  # noqa: suppress request logs in tests
+    def log_message(self, fmt, *args):  # suppress request logs in tests
         pass
 
     def do_GET(self):