feat: Implement file management and authorization features

- Add RequiresPermissionAttribute for gRPC method access control.
- Create IFileManagementService interface for file upload and management.
- Implement AddProductImageCommand and handler for adding product images.
- Implement CreateNewProductsCommand and handler for creating new products with image uploads.
- Implement DeleteProductsCommand and handler for deleting products and their associations.
- Implement RemoveProductImageCommand and handler for removing product images from galleries.
- Implement UpdateProductsCommand and handler for updating product details and images.
- Create GetProductGalleryQuery and handler for retrieving product galleries.
- Implement PermissionService for role-based access control using JWT claims.
- Implement FileManagementService for handling file uploads and image optimization.
- Define gRPC service and messages for file management in fms.proto.
- Add FluentValidation for request validation in various commands.
- Create PermissionInterceptor for enforcing permissions on gRPC methods.

src/CMSMicroservice.WebApi/Services/CategoryService.cs

@@ -100,7 +100,22 @@ public class CategoryService : CategoryContract.CategoryContractBase
 
     public override async Task<GetCategoryByIdForCustomerResponse> GetCategoryByIdForCustomer(GetCategoryByIdForCustomerRequest request, ServerCallContext context)
     {
-        // TODO: Implement using existing CMS Category Application layer
-        throw new RpcException(new Status(StatusCode.Unimplemented, "GetCategoryByIdForCustomer not implemented yet"));
+        var query = new GetCategoryQuery { Id = request.Id };
+        var result = await _sender.Send(query, context.CancellationToken);
+        
+        return new GetCategoryByIdForCustomerResponse
+        {
+            Category = new GetAllCategoryFilterResponseModel
+            {
+                Id = result.Id,
+                Name = result.Name,
+                Title = result.Title,
+                Description = result.Description ?? string.Empty,
+                ImagePath = result.ImagePath ?? string.Empty,
+                ParentId = result.ParentId ?? 0,
+                IsActive = result.IsActive,
+                SortOrder = result.SortOrder
+            }
+        };
     }
 }