{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-nestingvuildbiotope-inbjctqb","versions":[{"created_at":"2026-10-27T06:49:44Z","element_count":48,"note":"","saved_by":"editor","sha256":"76a3c81ff267c1650d9160b4283d8f43b1d72a18778a873b44bc849a07753b29","version":2}]}