Retrieves an alert routing rule

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

{
  "data": {
    "id": "019ad799-9f3a-4c7b-9173-ae0d0119e03f",
    "type": "alert_routing_rules",
    "attributes": {
      "name": "Alert Routing Rule 10",
      "alerts_source_id": "a9b5fbba-3edc-43fe-b906-0e907c3c5106",
      "condition_type": "all",
      "enabled": false,
      "position": 1,
      "destination": {
        "target_type": "EscalationPolicy",
        "target_id": "d6afff71-d19a-44ee-a536-8b0e9cfb27fb"
      },
      "created_at": "2026-02-17T18:06:54.849-08:00",
      "updated_at": "2026-02-17T18:06:54.849-08:00",
      "destinations": [
        {
          "target_type": "EscalationPolicy",
          "target_id": "d6afff71-d19a-44ee-a536-8b0e9cfb27fb"
        }
      ],
      "conditions": []
    },
    "relationships": {
      "owning_teams": {
        "data": [
          {
            "id": "31b73921-657d-4960-9807-7b78eb7f58f6",
            "type": "groups"
          }
        ]
      }
    }
  }
}