feat(v2): LimitAware 真实用量源——DBUsageSource 快照 + 对账 job 周期聚合当日已收(替 NopUsage)

internal/store/order_query.go

@@ -126,3 +126,24 @@ func (s *OrderStore) ExpireStaleOrders(cutoff time.Time, limit int) (int64, erro
 	}
 	return res.RowsAffected, nil
 }
+
+// SumPaidAttemptMinorByAccountSince 聚合各账户自 since 起的已付金额(minor),供 LimitAware
+// 判当日用量。量纲:attempt.AmountMinor 即账户所属渠道结算币种 minor(与 DailyLimit 同量纲)。
+func (s *OrderStore) SumPaidAttemptMinorByAccountSince(since time.Time) (map[string]int64, error) {
+	type row struct {
+		AccountID string
+		Total     int64
+	}
+	var rows []row
+	if err := s.db.Model(&model.Attempt{}).
+		Select("account_id, SUM(amount_minor) AS total").
+		Where("status = ? AND account_id <> '' AND paid_at >= ?", model.AttemptPaid, since).
+		Group("account_id").Scan(&rows).Error; err != nil {
+		return nil, fmt.Errorf("store.SumPaidAttemptMinorByAccountSince: %w", err)
+	}
+	out := make(map[string]int64, len(rows))
+	for _, r := range rows {
+		out[r.AccountID] = r.Total
+	}
+	return out, nil
+}