Logging: add informative console logs for startup, ports, connections, JOIN/deny, input, and periodic events

- Configure logging via LOG_LEVEL env (default INFO)
- Log when servers start listening (WT/QUIC/InMemory/HTTPS static)
- Log WT CONNECT accept, QUIC peer connect, datagram traffic at DEBUG
- Log GameServer creation, tick loop start, JOIN accept/deny, config_update broadcasts, and input reception

server/static_server.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import ssl
+import logging
 import threading
 from http.server import ThreadingHTTPServer, SimpleHTTPRequestHandler
 from pathlib import Path
@@ -31,5 +32,5 @@ def start_https_static(host: str, port: int, certfile: str, keyfile: str, docroo
 
     t = threading.Thread(target=httpd.serve_forever, name="https-static", daemon=True)
     t.start()
+    logging.info("HTTPS static server listening on https://%s:%d serving '%s'", host, port, docroot_path)
     return httpd, t
-