Add history command support and enum selection method

- Introduced new using directives for histories and models.
- Added `PickEnum<T>` method to randomly select enum values.
- Renamed region from `#region Envelope Command` to `#region Envelope`.
- Implemented `CreateHistoryCommand<TEnvelopeQuery, TReceiverQuery>` for creating history commands.
- Organized new method under a new region `#region History`.

EnvelopeGenerator.Tests.Application/Fake.cs

@@ -4,6 +4,8 @@ using DigitalData.UserManager.Domain.Entities;
 using EnvelopeGenerator.Application;
 using EnvelopeGenerator.Application.EnvelopeReceivers.Commands;
 using EnvelopeGenerator.Application.Envelopes.Commands;
+using EnvelopeGenerator.Application.Histories.Commands;
+using EnvelopeGenerator.Application.Model;
 using EnvelopeGenerator.Application.Receivers.Commands;
 using EnvelopeGenerator.Application.Users.Commands;
 using EnvelopeGenerator.Infrastructure;
@@ -14,6 +16,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using QuestPDF.Fluent;
 using QuestPDF.Infrastructure;
+using EnvelopeGenerator.Domain;
 
 namespace EnvelopeGenerator.Tests.Application;
 
@@ -128,6 +131,13 @@ public static class Extensions
 {
     public static Fake.Host ToFake(this IHost host) => new(host);
 
+    public static T PickEnum<T>(this Faker faker) where T : struct, Enum
+    {
+        var values = Enum.GetValues(typeof(T));
+        var index = faker.Random.Int(0, values.Length - 1);
+        return (T)values.GetValue(index)!;
+    }
+
     #region Receiver Command
     public static CreateReceiverCommand CreateReceiverCommand(this Faker fake) => new()
     {
@@ -140,7 +150,7 @@ public static class Extensions
             .ToList();
     #endregion
 
-    #region Envelope Command
+    #region Envelope
     public static CreateEnvelopeCommand CreateEnvelopeCommand(this Faker fake, int userId) => new()
     {
         Message = fake.Lorem.Paragraph(fake.Random.Number(2, 5)),
@@ -154,7 +164,7 @@ public static class Extensions
             .ToList();
     #endregion
 
-    #region Envelope Document
+    #region Document
     public static string CreatePdfAsBase64(this Faker faker)
     {
         string name = faker.Name.FullName();
@@ -193,6 +203,20 @@ public static class Extensions
         .ToList();
     #endregion
 
+    #region History
+    public static CreateHistoryCommand CreateHistoryCommand<TEnvelopeQuery, TReceiverQuery>(this Faker fake, string key, Constants.EnvelopeStatus? status = null)
+        where TEnvelopeQuery : EnvelopeQueryBase
+        where TReceiverQuery : ReceiverQueryBase
+    {
+        return new()
+        {
+            Status = status ?? fake.PickEnum<Constants.EnvelopeStatus>(),
+            Comment = fake.Lorem.Sentence(),
+            Key = key,
+        };
+    }
+    #endregion
+
     #region User Command
     public static CreateUserCommand CreateUserCommand(this Faker fake) => new()
     {