feat(application): add EmailSyncResult DTO, Folder/AccountId to ReceivedEmailDto, rename CreateRangeAsync in IRepository, update IImapEmailService signature, add AutoMapper profiles for ReceivedEmail and EmailAttachment

src/core/DigitalData.MessagingService.Application/Common/Dto/ReceivedEmailDto.cs

@@ -14,6 +14,15 @@ public sealed record ReceivedEmailDto
     public long Uid { get; set; }
 #endif
 
+    /// <summary>
+    /// ID of the email account this message belongs to.
+    /// </summary>
+#if NET
+    public int AccountId { get; init; }
+#else
+    public int AccountId { get; set; }
+#endif
+
     /// <summary>
     /// Sender address (From header).
     /// </summary>
@@ -94,4 +103,10 @@ public sealed record ReceivedEmailDto
 #else
     public bool IsSeen { get; set; }
 #endif
+
+#if NET
+    public required string Folder { get; init; }
+#else
+    public string Folder { get; set; } = null!;
+#endif
 }