fix: 修正 HasValidByCarrier 有效套餐定义，仅 status=Active 才算有效

修复Bug：原代码将 Pending(0) 也算作有效套餐，导致待生效套餐的卡
不会被触发停机指令。现改为仅生效中(Active)才算有效套餐。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/store/postgres/package_usage_store.go

@@ -172,17 +172,12 @@ func (s *PackageUsageStore) ResetDataUsage(ctx context.Context, id uint, lastRes
 		}).Error
 }
 
-// HasValidByCarrier 检查载体是否有有效套餐（status IN 待生效/生效中）
-// 修复Bug1：通过 carrierType 动态切换 device_id / iot_card_id 查询
+// HasValidByCarrier 检查载体是否有有效套餐（仅 status = 生效中）
 // carrierType: "iot_card" 或 "device"
 func (s *PackageUsageStore) HasValidByCarrier(ctx context.Context, carrierType string, carrierID uint) (bool, error) {
 	var count int64
-	validStatuses := []int{
-		constants.PackageUsageStatusPending, // 待生效
-		constants.PackageUsageStatusActive,  // 生效中
-	}
 	query := s.db.WithContext(ctx).Model(&model.PackageUsage{}).
-		Where("status IN ?", validStatuses)
+		Where("status = ?", constants.PackageUsageStatusActive)
 	if carrierType == "device" {
 		query = query.Where("device_id = ?", carrierID)
 	} else {