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

run.py

@@ -1,5 +1,6 @@
 import asyncio
 import os
+import logging
 
 from server.server import GameServer
 from server.config import ServerConfig
@@ -51,12 +52,18 @@ async def run_webtransport():
 
 if __name__ == "__main__":
     try:
+        # Logging setup
+        level = os.environ.get("LOG_LEVEL", "INFO").upper()
+        logging.basicConfig(level=getattr(logging, level, logging.INFO), format="[%(asctime)s] %(levelname)s: %(message)s")
         mode = os.environ.get("MODE", "mem").lower()
         if mode == "wt":
+            logging.info("Starting in WebTransport mode")
             asyncio.run(run_webtransport())
         elif mode == "quic":
+            logging.info("Starting in QUIC datagram mode")
             asyncio.run(run_quic())
         else:
+            logging.info("Starting in in-memory transport mode")
             asyncio.run(run_in_memory())
     except KeyboardInterrupt:
         pass