操作

curl -X POST http://127.0.0.1:21101/portal/diffs/submit \
  -H "Content-Type: application/json" \
  -d '{"diffs":[
    {"diff_id":"DF-2026Q3-01","note":"价格阶梯生效日差异：9 月账单按旧阶梯单价计费，擎苍侧按已生效新阶梯认定","voucher_no":"PT-2026-0901"},
    {"diff_id":"DF-2026Q3-02","note":"折扣券差异：CPN-3341 已核销抵扣 960.00 元","voucher_no":"CPN-3341"},
    {"diff_id":"DF-2026Q3-03","note":"运费分摊差异：按 Q3 整批运费分摊协议扣减 325.00 元","voucher_no":"TRA-0912"}]}'

预期回执（预确认码）：

{"ok": true, "preconfirm_code": "PC-2026Q3-K7M24", "count": 3}