feat(deploy): add systemd templates for production linux deployment

Adds production-ready systemd service templates for Linux deployments.

Includes:
- : Auto-restart configuration for the main process.
- : Configuration for Cloudflare Tunnel dependent on the gateway.
- Documentation in .

This simplifies self-hosting setup on VPS and Home Lab environments.

docs/deploy/linux-systemd.md

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+# Linux Systemd Deployment
+
+For production deployments on Linux (VPS, Raspberry Pi, Home Lab), it is recommended to run Clawdbot as a systemd service. This ensures the gateway restarts automatically on crash or reboot.
+
+If you also use Cloudflare Tunnels for remote access, you can configure a dependent service to ensure the tunnel stays connected to the gateway.
+
+## Prerequisites
+
+1.  Node.js (v22+)
+2.  `cloudflared` (if using remote access)
+3.  Clawdbot repository cloned and built (`pnpm install && pnpm build`)
+
+## 1. Setup Gateway Service
+
+1.  Copy the example template:
+    ```bash
+    sudo cp deploy/systemd/clawdbot-gateway.service.example /etc/systemd/system/clawdbot-gateway.service
+    ```
+
+2.  Edit the file to match your user and paths:
+    ```bash
+    sudo nano /etc/systemd/system/clawdbot-gateway.service
+    ```
+    - Change `User=<YOUR_USER>` to your username.
+    - Change `WorkingDirectory` to your Clawdbot folder.
+    - Update `ExecStart` with your preferred flags (e.g. secure token).
+
+3.  Reload and start:
+    ```bash
+    sudo systemctl daemon-reload
+    sudo systemctl enable --now clawdbot-gateway
+    ```
+
+## 2. Setup Cloudflare Tunnel (Optional)
+
+This service is configured to depend on `clawdbot-gateway`, ensuring robust connectivity.
+
+1.  Copy the example template:
+    ```bash
+    sudo cp deploy/systemd/clawdbot-tunnel.service.example /etc/systemd/system/clawdbot-tunnel.service
+    ```
+
+2.  Edit the file:
+    ```bash
+    sudo nano /etc/systemd/system/clawdbot-tunnel.service
+    ```
+    - Update `User` and `ExecStart` paths.
+    - Ensure your tunnel is already created (`cloudflared tunnel create <name>`).
+
+3.  Enable:
+    ```bash
+    sudo systemctl enable --now clawdbot-tunnel
+    ```
+
+## Operations
+
+Check status:
+```bash
+systemctl status clawdbot-gateway clawdbot-tunnel
+```
+
+View logs:
+```bash
+journalctl -u clawdbot-gateway -f
+```