Get an alert route

curl --request GET \
  --url https://api.rootly.com/v1/alert_routes/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "b589c2a3-30a6-4d74-a3ab-e312e169ce1d",
    "type": "alert_routes",
    "attributes": {
      "name": "Test Alert Route-66b3",
      "enabled": true,
      "created_at": "2026-01-25T11:01:37.440-08:00",
      "updated_at": "2026-01-25T11:01:37.440-08:00",
      "alerts_source_ids": [],
      "owning_team_ids": [],
      "rules": []
    }
  }
}