fix(cma): NP-001 无预算走补录流程(不 block)——口径②

按任总口径②：e1 无匹配预算 → verdict=warn（走指定/补录预算流程，不硬卡死）；
仅「有预算且超」才 block。修正后无预算付款可正常进 pending_approval，
不再阻塞 AU-001 拆单累计/日累计（T7/T8）。

Ref: 0-P0-project-20260915-cma-treasury-stage1

backend/app/api/treasury.py

@@ -159,8 +159,7 @@ def _eval_np001(db, entity_id, payment, rule) -> dict:
             budget_value, scope = bp.budget_value, f"kpi:{bp.kpi_id}@{period}"
     this_amt = _r(payment.amount)
     if budget_value is None:
-        return {"rule_code": "NP-001", "verdict": ("blocked" if severity == "block" else severity),
-                "severity": severity,
+        return {"rule_code": "NP-001", "verdict": "warn", "severity": severity,
                 "detail": _hit_detail("NP-001", rule.rule_version, "none", None, this_amt,
                                       (params.get("unmatched") or "specify_budget_flow")
                                       + "（未匹配到预算：走指定/补录预算流程并留痕，不直接卡死）")}