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": "cfb7e037-c7c5-431d-9dc9-cbcd0f6fde6f",
    "type": "incident_role_tasks",
    "attributes": {
      "incident_role_id": "48f81258-1495-4e70-8e06-baeb9ba68719",
      "task": "New task",
      "description": "New task description",
      "priority": "high",
      "created_at": "2025-12-05T21:26:30.256-08:00",
      "updated_at": "2025-12-05T21:26:30.256-08:00"
    }
  }
}