chore: add systemd service files for auto-start

Add systemd unit files for automatic service startup:
- horux-api.service: API server on port 4000
- horux-web.service: Web frontend on port 3000

Services are configured to:
- Start automatically on boot
- Restart on failure
- Depend on PostgreSQL

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

deploy/systemd/horux-web.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Horux360 Web Frontend
+After=network.target horux-api.service
+Wants=horux-api.service
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/root/Horux/apps/web
+Environment=NODE_ENV=production
+Environment=PATH=/root/.local/share/pnpm:/usr/local/bin:/usr/bin:/bin
+ExecStart=/root/.local/share/pnpm/pnpm dev
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target