Add ApiExplorerSettings to DTOs and update controllers

This commit introduces the `[ApiExplorerSettings(IgnoreApi = true)]` attribute to various DTO classes to exclude them from API documentation. The `using Microsoft.AspNetCore.Mvc;` directive has been added to several files to support ASP.NET Core MVC features.

Additionally, comments in `HistoryController.cs` have been reformatted for clarity, and `LocalizationController.cs` has been updated with standard API controller attributes. These changes improve code organization and maintain cleaner API documentation.

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverBasicDto.cs

@@ -1,8 +1,10 @@
 using DigitalData.Core.Abstractions;
 using DigitalData.EmailProfilerDispatcher.Abstraction.Attributes;
+using Microsoft.AspNetCore.Mvc;
 
 namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver
 {
+    [ApiExplorerSettings(IgnoreApi = true)]
     public record EnvelopeReceiverBasicDto() : IUnique<(int Envelope, int Receiver)>
     {
         public (int Envelope, int Receiver) Id => (Envelope: EnvelopeId, Receiver: ReceiverId);

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverDto.cs

@@ -1,7 +1,9 @@
 using EnvelopeGenerator.Application.DTOs.Receiver;
+using Microsoft.AspNetCore.Mvc;
 
 namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver
 {
+    [ApiExplorerSettings(IgnoreApi = true)]
     public record EnvelopeReceiverDto() : EnvelopeReceiverBasicDto()
     {
         public EnvelopeDto? Envelope { get; set; }

EnvelopeGenerator.Application/DTOs/EnvelopeReceiver/EnvelopeReceiverSecretDto.cs

@@ -1,5 +1,8 @@
-namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver
+using Microsoft.AspNetCore.Mvc;
+
+namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiver
 {
+    [ApiExplorerSettings(IgnoreApi = true)]
     public record EnvelopeReceiverSecretDto() : EnvelopeReceiverDto()
     {
         public string? AccessCode { get; init; }