feat: add /v1/models endpoint and systemd service for orchestrator

- Add OpenAI-compatible /v1/models endpoint to list available models
- Create systemd service file for proper service management
- Service runs as root with automatic restart on failure
- Logs to systemd journal for easy debugging

systemd/ai-orchestrator.service

@@ -0,0 +1,24 @@
+[Unit]
+Description=AI Model Orchestrator for RunPod
+After=network.target
+StartLimitIntervalSec=0
+
+[Service]
+Type=simple
+Restart=always
+RestartSec=10
+User=root
+WorkingDirectory=/workspace/ai
+EnvironmentFile=/workspace/ai/.env
+ExecStart=/usr/bin/python3 /workspace/ai/model-orchestrator/orchestrator_subprocess.py
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=ai-orchestrator
+
+# Process management
+KillMode=process
+KillSignal=SIGTERM
+TimeoutStopSec=30
+
+[Install]
+WantedBy=multi-user.target