Creates an incident role task

curl --request POST \
  --url https://api.rootly.com/v1/incident_roles/{incident_role_id}/incident_role_tasks \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "incident_role_tasks",
    "attributes": {
      "incident_role_id": "<string>",
      "task": "<string>",
      "description": "<string>",
      "priority": "high"
    }
  }
}'

{
  "data": {
    "id": "f2fec81f-781a-43d0-a34f-22e5294f837a",
    "type": "incident_role_tasks",
    "attributes": {
      "incident_role_id": "dff26baf-cc8b-42e7-ae68-84dcf40e16f8",
      "task": "New task",
      "description": "New task description",
      "priority": "high",
      "created_at": "2025-10-07T00:19:43.014-07:00",
      "updated_at": "2025-10-07T00:19:43.014-07:00"
    }
  }
}