Retrieves an alert routing rule

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

{
  "data": {
    "id": "b7c371ff-009e-45e5-a786-ca4cb348a2b7",
    "type": "alert_routing_rules",
    "attributes": {
      "name": "Alert Routing Rule 4",
      "alerts_source_id": "1b479725-a77e-44a6-bbf2-40467f5e8d77",
      "condition_type": "all",
      "enabled": false,
      "position": 1,
      "destination": {
        "target_type": "EscalationPolicy",
        "target_id": "212b194e-dd42-43ea-b3b5-da7c1d2255c0"
      },
      "created_at": "2025-12-18T04:03:31.324-08:00",
      "updated_at": "2025-12-18T04:03:31.324-08:00",
      "destinations": [
        {
          "target_type": "EscalationPolicy",
          "target_id": "212b194e-dd42-43ea-b3b5-da7c1d2255c0"
        }
      ],
      "conditions": []
    },
    "relationships": {
      "owning_teams": {
        "data": [
          {
            "id": "4cfedbc2-9fd2-4cef-8dfe-fb158f0b3ede",
            "type": "groups"
          }
        ]
      }
    }
  }
}