List budgets

Example response

{
  "data": [
    {
      "attributes": {
        "created_at": 1741011342772,
        "created_by": "user1",
        "end_month": 202502,
        "metrics_query": "aws.cost.amortized{service:ec2} by {service}",
        "name": "my budget",
        "org_id": 123,
        "start_month": 202501,
        "total_amount": 1000,
        "updated_at": 1741011342772,
        "updated_by": "user2"
      },
      "id": "00000000-0a0a-0a0a-aaa0-00000000000a",
      "type": "budget"
    }
  ]
}