Fix sending draft issue.

Wino.Core.Domain/Models/MailItem/SendDraftPreparationRequest.cs

@@ -5,33 +5,13 @@ using Wino.Core.Domain.Extensions;
 
 namespace Wino.Core.Domain.Models.MailItem
 {
-    public class SendDraftPreparationRequest
+    public record SendDraftPreparationRequest(MailCopy MailItem,
+                                              MailAccountAlias SendingAlias,
+                                              MailItemFolder SentFolder,
+                                              MailItemFolder DraftFolder,
+                                              MailAccountPreferences AccountPreferences,
+                                              string Base64MimeMessage)
     {
-        public MailCopy MailItem { get; }
-        public string Base64MimeMessage { get; }
-        public MailItemFolder SentFolder { get; }
-        public MailItemFolder DraftFolder { get; }
-        public MailAccountPreferences AccountPreferences { get; }
-        public MailAccountAlias SendingAlias { get; set; }
-
-        public SendDraftPreparationRequest(MailCopy mailItem,
-                                           MailAccountAlias sendingAlias,
-                                           MailItemFolder sentFolder,
-                                           MailItemFolder draftFolder,
-                                           MailAccountPreferences accountPreferences,
-                                           string base64MimeMessage)
-        {
-            MailItem = mailItem;
-            SendingAlias = sendingAlias;
-            SentFolder = sentFolder;
-            DraftFolder = draftFolder;
-            AccountPreferences = accountPreferences;
-            Base64MimeMessage = base64MimeMessage;
-        }
-
-        [JsonConstructor]
-        private SendDraftPreparationRequest() { }
-
         [JsonIgnore]
         private MimeMessage mime;