Update property accessor and resource management

Modified the `ByteData` property in `DocumentDto.cs` to use a `set` accessor instead of `init`, enabling updates after initialization.

Updated resource manager references in `frmEnvelopeMainData.vb` to use `CommonServices.My.Resources.Model.ResourceManager` for localized string retrieval.

EnvelopeGenerator.Application/Common/Dto/DocumentDto.cs

@@ -23,5 +23,5 @@ public record DocumentDto : DocumentDetailsDto
     /// <summary>
     /// Gets or sets the binary data of the document, if available.
     /// </summary>
-    public byte[]? ByteData { get; init; }
+    public byte[]? ByteData { get; set; }
 }

EnvelopeGenerator.Form/frmEnvelopeMainData.vb

@@ -105,10 +105,10 @@ Public Class frmEnvelopeMainData
         End If
     End Sub
     Private Function TranslateCertificationType(pType As CertificationType) As String
-        Return Resources.Model.ResourceManager.GetString(pType.ToString())
+        Return CommonServices.My.Resources.Model.ResourceManager.GetString(pType.ToString())
     End Function
     Private Function TranslateFinalEmailType(pType As FinalEmailType) As String
-        Return Resources.Model.ResourceManager.GetString(pType.ToString())
+        Return CommonServices.My.Resources.Model.ResourceManager.GetString(pType.ToString())
     End Function
 
     Private Sub btOK_Click(sender As Object, e As EventArgs) Handles btOK.Click