feat: persist product claimed counts

server/internal/dao/internal/product.go

@@ -35,6 +35,7 @@ type ProductColumns struct {
 	CoverUrl          string // 封面URL
 	DetailHtml        string // 商品详情
 	IsRecommended     string // 是否推荐
+	ClaimedCount      string // 已领取展示数
 	PublishStatus     string // 发布状态
 	StartAt           string // 展示开始时间
 	EndAt             string // 展示结束时间
@@ -65,6 +66,7 @@ var productColumns = ProductColumns{
 	CoverUrl:          "cover_url",
 	DetailHtml:        "detail_html",
 	IsRecommended:     "is_recommended",
+	ClaimedCount:      "claimed_count",
 	PublishStatus:     "publish_status",
 	StartAt:           "start_at",
 	EndAt:             "end_at",