feat: complete service rename and add missing files

Service Management:
- Renamed aitbc-production-monitor.service → aitbc-monitor.service
- Added aitbc-monitor.service to git for deployment consistency
- Ensures service configuration is version controlled

New Services:
- Added services/blockchain_follower.py for port 8007 follower node
- Added systemd/aitbc-follower-node.service for follower node management
- Complete blockchain node infrastructure

Deployment:
- Both nodes now have consistent service configuration
- All services operational and verified
- Git integration ensures future deployments work correctly

systemd/aitbc-follower-node.service

@@ -0,0 +1,29 @@
+[Unit]
+Description=AITBC Blockchain Follower Node (Port 8007)
+After=network.target aitbc-blockchain-node.service
+Wants=aitbc-blockchain-node.service
+
+[Service]
+Type=simple
+User=root
+Group=root
+Environment=NODE_ENV=production
+Environment=NODE_ID=follower-node-8007
+Environment=PYTHONPATH=/opt/aitbc/apps/blockchain-node/src:/opt/aitbc/services
+Environment=BLOCKCHAIN_DATA_DIR=/var/lib/aitbc/data/follower
+Environment=BLOCKCHAIN_CONFIG_DIR=/etc/aitbc
+Environment=BLOCKCHAIN_LOG_DIR=/var/log/aitbc/production
+Environment=BLOCKCHAIN_PORT=8007
+Environment=BLOCKCHAIN_ROLE=follower
+Environment=BLOCKCHAIN_GENESIS_NODE=http://localhost:8006
+ExecStart=/opt/aitbc/venv/bin/python /opt/aitbc/services/blockchain_simple.py
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=mixed
+TimeoutStopSec=30
+Restart=always
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=multi-user.target