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": "559b4e61-220d-450a-a0e8-d30985606fcf",
    "type": "incident_role_tasks",
    "attributes": {
      "incident_role_id": "dd7692d9-8070-46e9-87f4-c939b5033eaa",
      "task": "New task",
      "description": "New task description",
      "priority": "high",
      "created_at": "2025-09-15T22:54:55.397-07:00",
      "updated_at": "2025-09-15T22:54:55.397-07:00"
    }
  }
}