curl --request GET \
  --url https://staging.cutmake.ai/api/v1/budget/{budget_id}

{
  "id": "<string>",
  "name": "<string>",
  "budgetType": "<string>",
  "amount": 123,
  "utilizedAmount": 123,
  "code": "<string>",
  "salesOrderId": "<string>",
  "managementAccountId": "<string>",
  "periodStart": "<string>",
  "periodEnd": "<string>",
  "refreshFrequency": "<string>",
  "status": "<string>",
  "notes": "<string>",
  "createdAt": "<string>",
  "totalAmount": 123
}