{"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-house-rjgx9zvm","versions":[{"created_at":"2026-06-09T16:27:37Z","element_count":117,"note":"","saved_by":"editor","sha256":"5073a935a05db1a0d06dfd44d1524dbddda46e6858d69d7d810bd435354ee089","version":4},{"created_at":"2026-06-09T16:07:49Z","element_count":117,"note":"","saved_by":"editor","sha256":"79c54eba965d8e0a85c5e8e666b5d528ca5b58eab71c12eb77ec0dc9e4421375","version":3},{"created_at":"2026-06-09T15:48:55Z","element_count":117,"note":"","saved_by":"editor","sha256":"3896debe4795ed614145b996fe633ca4acffc21cfadbe0d01a9fafb2465d91f5","version":2}]}