create CreateHistoryCommand

EnvelopeGenerator.Application/Histories/Commands/CreateHistoryCommand.cs

@@ -0,0 +1,39 @@
+using EnvelopeGenerator.Domain;
+
+namespace EnvelopeGenerator.Application.Histories.Commands;
+
+/// <summary>
+/// 
+/// </summary>
+public record CreateHistoryCommand
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public int EnvelopeId { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string UserReference { get; set; } = null!;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public Constants.EnvelopeStatus Status { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public DateTime AddedWhen { get; } = DateTime.Now;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public DateTime ActionDate => AddedWhen;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public string? Comment { get; set; }
+}

EnvelopeGenerator.Domain/Entities/EnvelopeHistory.cs

@@ -38,14 +38,28 @@ public class EnvelopeHistory
     public DateTime AddedWhen { get; set; }
 
     [Column("ACTION_DATE", TypeName = "datetime")]
-    public DateTime ActionDate { get; set; } = DateTime.Now;
+    public DateTime? ActionDate { get; set; } = DateTime.Now;
 
     [Column("COMMENT", TypeName = "nvarchar(max)")]
-    public string Comment { get; set; }
+    public string
+#if NET
+        ?
+#endif
+        Comment { get; set; }
 
-    public virtual User Sender { get; set; }
+    public virtual User
+#if NET
+        ?
+#endif
+        Sender
+    { get; set; }
 
-    public virtual Receiver Receiver { get; set; }
+    public virtual Receiver
+#if NET
+        ?
+#endif
+        Receiver
+    { get; set; }
 
 #if NETFRAMEWORK
     [NotMapped]