create CreateHistoryCommand

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]