Spawn a child run

curl --request POST \
  --url https://api.strait.dev/sdk/v1/runs/{runID}/spawn \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "job_slug": "<string>",
  "project_id": "<string>",
  "await_completion": true,
  "await_timeout_secs": 123,
  "payload": "<unknown>",
  "target_api_key": "<string>"
}
'

{
  "$schema": "<string>",
  "detail": "<string>",
  "errors": [
    {
      "location": "<string>",
      "message": "<string>",
      "value": "<unknown>"
    }
  ],
  "instance": "<string>",
  "status": 123,
  "title": "<string>",
  "type": "about:blank"
}