feat: implement locking mechanism for marketplace operations to prevent race conditions

internal/ym/products/repository_api.go

@@ -117,6 +117,13 @@ func (r *apiRepository) GetProducts(ctx context.Context, marketplaceID int, req
 		resultChan <- cachedMessage.Offers
 		return
 	}
+	locker := *redis.Locker
+	_, cancel, err := locker.TryWithContext(ctx, fmt.Sprintf("ym:products:marketplace:%d:lock", businessID))
+	if err != nil {
+		return
+	}
+	defer cancel()
+
 	r.setOfferMappingsRateLimit(businessID)
 	// all offers
 	var allOffers []*pb.GetProductsResponse_Offer
@@ -213,11 +220,17 @@ func (r *apiRepository) CalculateProductTariffs(ctx context.Context, marketplace
 	defer close(resultChan)
 	defer close(errChan)
 
-	_, client, _, err := r.setupMarketplaceClient(ctx, marketplaceID)
+	_, client, businessId, err := r.setupMarketplaceClient(ctx, marketplaceID)
 	if err != nil {
 		errChan <- err
 		return
 	}
+	locker := *redis.Locker
+	_, cancel, err := locker.WithContext(ctx, fmt.Sprintf("ym:tariffs:marketplace:%d:lock", businessId))
+	if err != nil {
+		return
+	}
+	defer cancel()
 
 	r.setTariffsRateLimit()