No domain output. dashboardAPI emits **HTTP request envelopes on Port 0**, shaped for a downstream `http request` node:

```js
{
  topic: 'create',
  url: 'http://<grafana>:<port>/api/dashboards/db',
  method: 'POST',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'application/json',
    Authorization: 'Bearer …'   // only when bearerToken is set
  },
  payload: { dashboard: {…}, folderId: 0, overwrite: true },
  meta: { nodeId, softwareType, uid, title }
}
```

Port 1 (InfluxDB telemetry) and Port 2 (registration / control plumbing) are unused — dashboardAPI has no measurements and does not register with a parent.