Add project files.

Core.Blueprint.Service.UseCases/GetSampleImage/GetSampleImageHandler.cs

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+using Core.Blueprint.Service.Domain.Dtos;
+using Core.Blueprint.Service.External.Clients.SampleImageClient;
+using Core.Blueprint.Service.UseCases.GetSampleImage.Input;
+using Core.Blueprint.Service.UseCases.GetSampleImage.Ports;
+using FluentValidation;
+using Lib.Architecture.BuildingBlocks;
+
+namespace Core.Blueprint.Service.UseCases.GetSampleImage
+{
+    public class GetSampleImageHandler(IGetSampleImagePort port, IValidator<GetSampleImageRequest> validator, ISampleImageClientService clientService) : IComponentHandler<GetSampleImageRequest>
+    {
+        private readonly IGetSampleImagePort _port = port;
+        private readonly IValidator<GetSampleImageRequest> _validator = validator;
+        private readonly ISampleImageClientService _clientService = clientService;
+
+        public async ValueTask ExecuteAsync(GetSampleImageRequest command, CancellationToken cancellationToken = default)
+        {
+            try
+            {
+                if (!command.IsValid(_validator))
+                {
+                    _port.ValidationErrors(command.Notifications);
+                    return;
+                }
+
+                var result = await _clientService.GetFirstImageUrl();
+
+                if (result == null)
+                {
+                    _port.NoContentSuccess();
+                    return;
+                }
+
+                _port.Success(result);
+            }
+            catch(Exception ex)
+            {
+                _port.BusinessError(ex.Message);
+            }
+
+        }
+    }
+}