Creates a cause

curl --request POST \
  --url https://api.rootly.com/v1/causes \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "causes",
    "attributes": {
      "name": "<string>",
      "description": "<string>",
      "position": 123
    }
  }
}'

{
  "data": {
    "id": "efab4a47-4f3f-49fd-8e78-2c2526806d51",
    "type": "causes",
    "attributes": {
      "slug": "how-to-handle-customer-facing-incident",
      "name": "How to handle customer-facing incident?",
      "description": "This is a description",
      "position": 1,
      "created_at": "2025-09-07T18:18:50.604-07:00",
      "updated_at": "2025-09-07T18:18:50.604-07:00"
    }
  }
}