{"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-solunainstanthousesi-fzk6mdlg","versions":[{"created_at":"2026-10-27T06:53:16Z","element_count":24,"note":"","saved_by":"editor","sha256":"9ccc72f2cfffc2907700a2b006619a0f98ea789f00f0ffe80a974570bfcc9586","version":2}]}