Creates a schedule

curl --request POST \
  --url https://api.rootly.com/v1/schedules \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "schedules",
    "attributes": {
      "name": "<string>",
      "description": "<string>",
      "all_time_coverage": true,
      "slack_user_group": {
        "id": "<string>",
        "name": "<string>"
      },
      "owner_group_ids": [
        "<string>"
      ],
      "owner_user_id": 123
    }
  }
}'

{
  "data": {
    "id": "e41e0362-0353-4760-affe-79156ff8f838",
    "type": "schedules",
    "attributes": {
      "name": "Schedule Name",
      "description": "Schedule Description",
      "all_time_coverage": true,
      "slack_user_group": {},
      "owner_user_id": 440,
      "owner_group_ids": [
        "52b70d7c-6cf9-4f46-a2e1-7e8651ee14ea"
      ],
      "created_at": "2025-08-28T14:04:55.912-07:00",
      "updated_at": "2025-08-28T14:04:55.912-07:00"
    },
    "relationships": {
      "owner_user": {
        "data": {
          "id": "440",
          "type": "users"
        }
      },
      "escalation_policies": {
        "data": []
      }
    }
  }
}