Rename /deploy to /tensors:deploy and rewrite in Ruby

Move deploy command to tensors namespace and replace bash script with
Ruby for better error handling. Adds API health check after restart.

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

.claude/commands/tensors/deploy.md

@@ -0,0 +1,35 @@
+# Deploy Tensors to Junkpile
+
+Deploy tensors API server to junkpile.
+
+Run the deploy script:
+
+```bash
+ruby scripts/deploy.rb
+```
+
+## What it does
+
+1. **Sync code** - Rsyncs Python code to `/opt/tensors/app/`
+2. **Fix permissions** - Sets ownership to `tensors:tensors`
+3. **Restart tensors** - Runs `sudo systemctl restart tensors`
+4. **Verify tensors** - Checks service is running
+5. **Health check** - Verifies API responds
+
+## Service Structure
+
+| Item | Value |
+|------|-------|
+| User/Group | `tensors:tensors` |
+| Install path | `/opt/tensors/app` |
+| Venv | `/opt/tensors/venv` |
+| Service | `tensors.service` |
+| Port | 51200 |
+
+## API Endpoints
+
+- `GET /status` - Health check
+- `GET /api/civitai/*` - CivitAI search and fetch
+- `GET /api/db/*` - Database management
+- `GET /api/images/*` - Image gallery
+- `POST /api/download` - Download models