Refactor CreateHistoryCommand and update tests

- Simplified `CreateHistoryCommand` method by removing generic type parameters.
- Updated `using` directives in `HistoryTests` to include necessary constants.
- Revised test method to utilize `Fake.Provider.CreateHistoryCommand` for improved maintainability.

EnvelopeGenerator.Tests.Application/HistoryTests.cs

@@ -1,6 +1,6 @@
 using EnvelopeGenerator.Application.Histories.Commands;
 using EnvelopeGenerator.Application.Histories.Queries;
-using EnvelopeGenerator.Domain;
+using EnvelopeGenerator.Domain.Constants;
 
 namespace EnvelopeGenerator.Tests.Application;
 
@@ -26,13 +26,8 @@ public class HistoryTests
     public async Task CreateHistory_And_ReadHistory_Should_Work()
     {
         // Arrange
-        var createCmd = new CreateHistoryCommand
-        {
-            EnvelopeId = 1,
-            UserReference = "UserA",
-            Status = EnvelopeStatus.EnvelopeCreated,
-            Comment = "First create"
-        };
+        var key = string.Empty;
+        var createCmd = Fake.Provider.CreateHistoryCommand(key);
 
         // Act
         var id = await _host.Mediator.Send(createCmd);