add correct business exception handling

use <FrameworkReference Include="Microsoft.AspNetCore.App" /> instead of old nuget packages

Azaion.Common/BusinessExceptionHandler.cs

@@ -0,0 +1,27 @@
+using Microsoft.AspNetCore.Diagnostics;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+
+namespace Azaion.Common;
+
+public class BusinessExceptionHandler(ILogger<BusinessExceptionHandler> logger) : IExceptionHandler
+{
+    public async ValueTask<bool> TryHandleAsync(HttpContext httpContext, Exception exception, CancellationToken cancellationToken)
+    {
+        if (exception is not BusinessException ex)
+            return false;
+
+        logger.LogWarning(exception, ex.Message);
+        httpContext.Response.StatusCode = StatusCodes.Status409Conflict;
+        httpContext.Response.ContentType = "application/json";
+
+        var err = JsonConvert.SerializeObject(new
+        {
+            ErrorCode = ex.ExceptionEnum,
+            ex.Message
+        });
+        await httpContext.Response.WriteAsync(err, cancellationToken).ConfigureAwait(false);
+        return true;
+    }
+}