{"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-kumaushibase-q6vxqzwy","versions":[{"created_at":"2026-10-27T06:45:14Z","element_count":91,"note":"","saved_by":"editor","sha256":"603766976fb19b56ae4e5c47e45e9f5e187b062b42ca1130e1ad0b26ad38e6f7","version":2}]}