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": {
      "task": "<string>",
      "incident_role_id": "<string>",
      "description": "<string>",
      "priority": "high"
    }
  }
}
'

{
  "data": {
    "id": "64cf9ac7-66d6-4506-b198-3e2733a67b03",
    "type": "incident_role_tasks",
    "attributes": {
      "incident_role_id": "2a8aad76-21a0-45a5-80d2-de58e8cb7774",
      "task": "New task",
      "description": "New task description",
      "priority": "high",
      "created_at": "2025-12-24T09:26:29.752-08:00",
      "updated_at": "2025-12-24T09:26:29.752-08:00"
    }
  }
}