修复设备套餐流量不同步的问题

internal/task/polling_carddata_handler.go

@@ -120,7 +120,7 @@ func (h *PollingCarddataHandler) Handle(ctx context.Context, t *asynq.Task) erro
 	h.base.updateCardCache(ctx, cardID, cacheUpdates)
 
 	if flowIncrementMB > 0 && h.usageService != nil {
-		if deductErr := h.usageService.DeductDataUsage(ctx, "iot_card", cardID, int64(flowIncrementMB)); deductErr != nil {
+		if deductErr := h.usageService.DeductDataUsage(ctx, constants.AssetTypeIotCard, cardID, flowIncrementMB); deductErr != nil {
 			h.base.logger.Warn("套餐流量扣减失败",
 				zap.Uint("card_id", cardID), zap.Float64("increment_mb", flowIncrementMB), zap.Error(deductErr))
 		}