Refactor OrderEventHandler to use IProductRepository for improved abstraction

docs/en/tutorials/microservice/part-07.md

@@ -170,9 +170,9 @@ public class OrderEventHandler :
     IDistributedEventHandler<OrderPlacedEto>,
     ITransientDependency
 {
-    private readonly IRepository<Product, Guid> _productRepository;
+    private readonly IProductRepository _productRepository;
 
-    public OrderEventHandler(IRepository<Product, Guid> productRepository)
+    public OrderEventHandler(IProductRepository productRepository)
     {
         _productRepository = productRepository;
     }

docs/en/tutorials/modular-crm/part-07.md

@@ -184,9 +184,9 @@ namespace ModularCrm.Products.Orders
         IDistributedEventHandler<OrderPlacedEto>, 
         ITransientDependency
     {
-        private readonly IRepository<Product, Guid> _productRepository;
+        private readonly IProductRepository _productRepository;
 
-        public OrderEventHandler(IRepository<Product, Guid> productRepository)
+        public OrderEventHandler(IProductRepository productRepository)
         {
             _productRepository = productRepository;
         }