{"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-ardennestimberbungal-p6t9v3df","versions":[{"created_at":"2026-06-10T22:53:56Z","element_count":63,"note":"legacy fix: jpy85444799→quote24122093 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ec5a8b1547dfbe66e579b0b13b39315396d6e19e3cbe8db2b5d60228f9c3d179","version":10},{"created_at":"2026-06-10T17:23:06Z","element_count":74,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"7f2c15355c31a829578b23f5af435a15e9a935b83478daa6a1a7052661a9c791","version":2}]}