Creates an escalation level for an Escalation Policy

curl --request POST \
  --url https://api.rootly.com/v1/escalation_policies/{escalation_policy_id}/escalation_levels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "escalation_levels",
    "attributes": {
      "delay": 123,
      "position": 123,
      "paging_strategy_configuration_strategy": "default",
      "paging_strategy_configuration_schedule_strategy": "on_call_only",
      "escalation_policy_path_id": "<string>",
      "notification_target_params": [
        {
          "id": "<string>",
          "type": "team",
          "team_members": "all"
        }
      ]
    }
  }
}'

{
  "data": {
    "id": "eedad56d-66ca-4b64-987d-7eb1462ee6a1",
    "type": "escalation_levels",
    "attributes": {
      "escalation_policy_path_id": "c9c35e23-5189-449c-ae6c-284bf1c93bef",
      "position": 1,
      "delay": 2,
      "escalation_policy_id": "4c106bf8-4e0e-4d54-b8b5-d070a26f8774",
      "paging_strategy_configuration_strategy": null,
      "paging_strategy_configuration_schedule_strategy": null,
      "created_at": "2025-05-08T00:18:02.856-07:00",
      "updated_at": "2025-05-08T00:18:02.856-07:00",
      "notification_target_params": [
        {
          "id": "103",
          "type": "user",
          "team_members": "all"
        },
        {
          "id": "7f1c9da8-425c-472f-889c-88193a0d51c9",
          "type": "schedule",
          "team_members": "all"
        },
        {
          "id": "CX21345",
          "type": "slack_channel",
          "team_members": "all"
        }
      ]
    }
  }
}