{"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-tapkop9000-0t3lyuu9","versions":[{"created_at":"2026-10-27T06:42:37Z","element_count":263,"note":"","saved_by":"editor","sha256":"47e913d58a6b7ce8165253430c3976d3b8df597ca37b36184ab51b420aa095d9","version":2}]}