refactor(ReadHistoryQuery): update to use dto and remove response class

EnvelopeGenerator.Application/Dto/EnvelopeHistory/EnvelopeHistoryDto.cs

@@ -1,5 +1,6 @@
 using DigitalData.UserManager.Application.DTOs.User;
 using EnvelopeGenerator.Application.Dto.Receiver;
+using EnvelopeGenerator.Domain;
 using static EnvelopeGenerator.Domain.Constants;
 
 namespace EnvelopeGenerator.Application.Dto.EnvelopeHistory;
@@ -29,6 +30,16 @@ public record EnvelopeHistoryDto
     /// </summary>
     public int Status { get; set; }
 
+    /// <summary>
+    /// Type of reference for this history entry.
+    /// </summary>
+    public Constants.ReferenceType ReferenceType => Status.ToString().FirstOrDefault() switch
+    {
+        '1' => Constants.ReferenceType.Sender,
+        '2' => Constants.ReferenceType.Receiver,
+        _ => Constants.ReferenceType.System,
+    };
+
     /// <summary>
     /// Human-readable name of the status.
     /// </summary>
@@ -54,11 +65,6 @@ public record EnvelopeHistoryDto
     /// </summary>
     public ReceiverReadDto? Receiver { get; set; }
 
-    /// <summary>
-    /// Type of reference for this history entry.
-    /// </summary>
-    public ReferenceType ReferenceType { get; set; }
-
     /// <summary>
     /// Optional comment related to this history entry.
     /// </summary>