Adds the possibility for the client to specify the message id when adding them

src/Web/Features/Messages/Handlers/AddMessage.cs

@@ -6,6 +6,7 @@ namespace Hutopy.Web.Features.Messages.Handlers;
 
 public class AddMessageRequest
 {
+    public Guid? Id { get; set; }
     public Guid SubjectId { get; set; }
     public string Message { get; set; }
 }
@@ -26,7 +27,7 @@ public class AddMessage(
     {
         var message = new Message
         {
-            Id = GuidHelper.GenerateUuidV7(),
+            Id = req.Id ?? GuidHelper.GenerateUuidV7(),
             SubjectId = req.SubjectId,
             CreatedBy = User.GetUserId(),
             Value = req.Message