{"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-1-1912x4-2xdhjtol","versions":[{"created_at":"2026-06-07T14:59:56Z","element_count":90,"note":"fork元 u-1-191-zbewfr3s / 2x4 枠組壁版 / 延床153㎡ 本体工事¥39780059 (現実単価26万/㎡) / 土地出典 https://suumo.jp/tochi/miyagi/sc_sendaishiaoba/nc_75252146/ 1950万円","saved_by":"editor","sha256":"9ee046f5f1142d4074fea37ae1eea2a163aae8050747156c23ff87dc2a41f8fa","version":2}]}