{"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-queensroadvilla-3chkqwh4","versions":[{"created_at":"2026-06-10T22:53:25Z","element_count":77,"note":"legacy fix: jpy102533759→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8503d9c280bf638a96939d1d82f1dc7de50c57ca36e147c24b0721c9fbc8fe62","version":10},{"created_at":"2026-06-10T16:55:07Z","element_count":73,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"0821de5170b019934cfb1c1a9c4946c7031247640cc5f332c39777287e7cd92c","version":2}]}