{"record_type":"contract|item|movement|party","record_id":"示例ID","title":"脱敏标题或摘要","keywords":["可检索关键词"],"date_range":"日期或日期范围","category":"采购/销售/个人私用/物流/其他","source_path":"相对证据路径","sensitivity":"public/internal/private","notes":"不含敏感金额、身份信息、完整合同原文"}