feat: initial VPS monitoring platform

- FastAPI backend with auth, server CRUD, metrics collection
- Web dashboard with dark theme, server cards, SSH terminal (xterm.js)
- Telegram bot with inline keyboards, server management, reboot
- Telegram Mini App for mobile monitoring
- Background monitoring via asyncssh (CPU, RAM, Disk, Network, Uptime)
- Alert system with configurable thresholds
- WebSocket SSH terminal in browser
- One-command install script
- Systemd service configuration

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

systemd/vps-monitoring.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=VPS Monitoring Service
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/vps-monitoring
+Environment=TELEGRAM_BOT_TOKEN=8815672362:AAFGwxrWjSsjGuc9iBpX0aupKRoKkviS2NA
+Environment=TELEGRAM_CHAT_ID=371010834
+ExecStart=/opt/vps-monitoring/venv/bin/uvicorn server.main:app --host 0.0.0.0 --port 8000
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target