Refactor email handling for improved structure

Refactored `Email` and `SendingEmailEvent` to use `record` types, consolidating email-related data into the `Email` class. Updated `SendEmailCommand` to return a `Guid` and simplified mapping logic in `EmailMappingProfile`. Adjusted `SendEmailCommandHandler` to construct `SendingEmailEvent` manually.

Updated `SendingEmailConsumer`, `EmailsController`, and `EmailSender` to reflect the new structure. Removed the old `Email` implementation. Improved logging to reference the `Mail` property.

Revised tests to align with the new structure, ensuring immutability and better separation of concerns.

src/presentation/DigitalData.MessagingService.API/Controllers/EmailsController.cs

@@ -23,11 +23,11 @@ public class EmailsController(IMediator mediator) : ControllerBase
     [ProducesResponseType(StatusCodes.Status400BadRequest)]
     public async Task<IActionResult> SendEmail([FromBody] SendEmailCommand command, CancellationToken cancellationToken)
     {
-        var sendingEmailEvent = await mediator.Send(command, cancellationToken);
+        var eventId = await mediator.Send(command, cancellationToken);
 
         return Accepted(new
         {
-            sendingEmailEvent.Id,
+            Id = eventId
         });
     }
 }

src/presentation/DigitalData.MessagingService.Client/Email.cs

@@ -1,46 +0,0 @@
-using DigitalData.MessagingService.Abstraction;
-
-namespace DigitalData.MessagingService.Client;
-
-/// <summary>
-/// Represents an outgoing email message to be sent through the messaging service.
-/// </summary>
-public record Email
-{
-    /// <summary>
-    /// Recipient email address
-    /// </summary>
-    public IEnumerable<string> Recipients { get; set; } = null!;
-
-    /// <summary>
-    /// Email subject
-    /// </summary>
-    public string Subject { get; set; } = null!;
-
-    /// <summary>
-    /// Email body (HTML or plain text)
-    /// </summary>
-    public string Body { get; set; } = null!;
-
-    /// <summary>
-    /// Is HTML email (default: true)
-    /// </summary>
-    public bool IsHtml { get; set; } = true;
-
-    /// <summary>
-    /// Converts this <see cref="Email"/> instance to an <see cref="SendingEmailEvent"/>.
-    /// </summary>
-    /// <returns>A new <see cref="SendingEmailEvent"/> representing this email.</returns>
-    internal SendingEmailEvent ToEvent()
-    {
-        return new SendingEmailEvent
-        {
-            Id = Guid.NewGuid(),
-            Recipients = Recipients,
-            Subject = Subject,
-            Body = Body,
-            IsHtml = IsHtml,
-            QueuedAt = DateTime.Now
-        };
-    }
-}

src/presentation/DigitalData.MessagingService.Client/EmailSender.cs

@@ -125,6 +125,11 @@ public static class EmailSender
             throw new InvalidOperationException("Messaging service is not connected. Call ConnectRabbitMq first.");
 
         var publisher = LazyProvider.Value.GetRequiredService<ISendingEmailPublisher>();
-        publisher.EnqueueAsync(email.ToEvent());
+        publisher.EnqueueAsync(new SendingEmailEvent()
+        {
+            Id = Guid.NewGuid(),
+            Mail = email,
+            QueuedAt = DateTime.Now
+        });
     }
 }