feat(v2): crypto 孤儿到账发现——OrphanScanner 扫链核对 + orphan_payments 落表告警(对账兜底)

internal/store/order_query.go

@@ -174,3 +174,17 @@ func (s *OrderStore) ListOrdersByStatus(statuses []model.OrderStatusV2, limit in
 	}
 	return out, nil
 }
+
+// ListAttemptsByChannelSince 列某渠道 created_at>=since 的 attempt(任意状态),
+// 供 orphan 扫描构造"已知期望金额集"(凡 pay 合法签发过的金额都不算孤儿)。
+func (s *OrderStore) ListAttemptsByChannelSince(channel string, since time.Time, limit int) ([]model.Attempt, error) {
+	if limit <= 0 || limit > 500 {
+		limit = 200
+	}
+	var out []model.Attempt
+	if err := s.db.Where("channel = ? AND created_at >= ?", channel, since).
+		Order("id DESC").Limit(limit).Find(&out).Error; err != nil {
+		return nil, fmt.Errorf("store.ListAttemptsByChannelSince: %w", err)
+	}
+	return out, nil
+}