refactor: migrate P2P network from Redis gossip to direct TCP mesh architecture

- Replaced Redis-based P2P with direct TCP connections for decentralized mesh networking
- Added handshake protocol with node_id exchange for peer authentication
- Implemented bidirectional connection management (inbound/outbound streams)
- Added peer dialing loop to continuously reconnect to initial peers
- Added ping/pong keepalive mechanism to maintain active connections
- Prevented duplicate connections through endpoint

systemd/aitbc-loadbalancer-geo.service

@@ -1,24 +0,0 @@
-[Unit]
-Description=AITBC Geographic Load Balancer (Port 8017)
-After=network.target aitbc-coordinator-api.service aitbc-marketplace-enhanced.service
-Wants=aitbc-coordinator-api.service aitbc-marketplace-enhanced.service
-
-[Service]
-Type=simple
-User=aitbc
-Group=aitbc
-WorkingDirectory=/opt/aitbc
-Environment=PATH=/usr/bin
-Environment=PORT=8017
-Environment=SERVICE_TYPE=loadbalancer-geo
-Environment=LOG_LEVEL=INFO
-ExecStart=/usr/bin/python3 /opt/aitbc/apps/coordinator-api/scripts/geo_load_balancer.py --port 8017
-ExecReload=/bin/kill -HUP $MAINPID
-Restart=always
-RestartSec=10
-StandardOutput=journal
-StandardError=journal
-SyslogIdentifier=aitbc-loadbalancer-geo
-
-[Install]
-WantedBy=multi-user.target