Add new properties to SignatureDto for signature details

Added the `System.ComponentModel.DataAnnotations.Schema` namespace.
Introduced new properties to the `SignatureDto` class:
- `FullName` (string?) for the full name of the signature entity.
- `Position` (string?) for the position of the signature entity.
- `Place` (string?) for the place associated with the signature entity.
- `Ink` (byte[]?) for the ink data of the signature entity.

EnvelopeGenerator.Application/Common/Dto/SignatureDto.cs

@@ -1,6 +1,7 @@
 using EnvelopeGenerator.Domain.Constants;
 using EnvelopeGenerator.Domain.Interfaces;
 using Microsoft.AspNetCore.Mvc;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace EnvelopeGenerator.Application.Common.Dto;
 
@@ -104,4 +105,24 @@ public class SignatureDto : ISignature
     /// 
     /// </summary>
     public SenderAppType SenderAppType { get; set; } = SenderAppType.LegacyFormApp;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? FullName { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? Position { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? Place { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public byte[]? Ink { get; set; }
 }