refactor(backend): 拆分 Wire ProviderSet

backend/internal/service/redeem_service.go

@@ -57,20 +57,22 @@ type RedeemService struct {
 }
 
 // NewRedeemService 创建兑换码服务实例
-func NewRedeemService(redeemRepo *repository.RedeemCodeRepository, userRepo *repository.UserRepository, subscriptionService *SubscriptionService, rdb *redis.Client) *RedeemService {
+func NewRedeemService(
+	redeemRepo *repository.RedeemCodeRepository,
+	userRepo *repository.UserRepository,
+	subscriptionService *SubscriptionService,
+	rdb *redis.Client,
+	billingCacheService *BillingCacheService,
+) *RedeemService {
 	return &RedeemService{
 		redeemRepo:          redeemRepo,
 		userRepo:            userRepo,
 		subscriptionService: subscriptionService,
 		rdb:                 rdb,
+		billingCacheService: billingCacheService,
 	}
 }
 
-// SetBillingCacheService 设置计费缓存服务（用于缓存失效）
-func (s *RedeemService) SetBillingCacheService(billingCacheService *BillingCacheService) {
-	s.billingCacheService = billingCacheService
-}
-
 // GenerateRandomCode 生成随机兑换码
 func (s *RedeemService) GenerateRandomCode() (string, error) {
 	// 生成16字节随机数据