节点智能体心跳

curl -X POST http://<pin-host>:8001/v1/agent/heartbeat \
  -H "Authorization: Bearer <agent-token>" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_id": "ag_1234567890",
    "gpus": [
      {"index":0,"model":"A100","mem_total_gb":80.0,"mem_used_gb":10.0,"slots":1,"used_slots":1}
    ],
    "status": "online",
    "version": "1.2.0"
  }'

{
  "ok": true
}