feat(CreateHistoryCommand): add CreateHistoryCommandHandler with repository integration

- Extend CreateHistoryCommand to implement IRequest<long?>
- Introduce CreateHistoryCommandHandler to handle command via IRepository<EnvelopeHistory>
- Implement async creation and verification of EnvelopeHistory records

EnvelopeGenerator.Application/Histories/Commands/CreateHistoryCommand.cs

@@ -1,11 +1,15 @@
-using EnvelopeGenerator.Domain;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Domain;
+using EnvelopeGenerator.Domain.Entities;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Application.Histories.Commands;
 
 /// <summary>
 /// 
 /// </summary>
-public record CreateHistoryCommand
+public record CreateHistoryCommand : IRequest<long?>
 {
     /// <summary>
     /// 
@@ -36,4 +40,42 @@ public record CreateHistoryCommand
     /// 
     /// </summary>
     public string? Comment { get; set; }
+}
+
+/// <summary>
+/// 
+/// </summary>
+public class CreateHistoryCommandHandler : IRequestHandler<CreateHistoryCommand, long?>
+{
+    private readonly IRepository<EnvelopeHistory> _repo;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="repo"></param>
+    public CreateHistoryCommandHandler(IRepository<EnvelopeHistory> repo)
+    {
+        _repo = repo;
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="request"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
+    public async Task<long?> Handle(CreateHistoryCommand request, CancellationToken cancel)
+    {
+        // create entitiy
+        await _repo.CreateAsync(request, cancel);
+
+        // check if created
+        var record = await _repo.ReadOnly()
+            .Where(h => h.EnvelopeId == request.EnvelopeId)
+            .Where(h => h.UserReference == request.UserReference)
+            .Where(h => h.ActionDate == request.ActionDate)
+            .SingleOrDefaultAsync(cancel);
+
+        return record?.Id;
+    }
 }

EnvelopeGenerator.Application/Histories/MappingProfile.cs

@@ -1,4 +1,5 @@
 using AutoMapper;
+using EnvelopeGenerator.Application.Histories.Commands;
 using EnvelopeGenerator.Application.Histories.Queries.Read;
 using EnvelopeGenerator.Domain.Entities;
 
@@ -15,5 +16,6 @@ public class MappingProfile: Profile
     public MappingProfile()
     {
         CreateMap<EnvelopeHistory, ReadHistoryResponse>();
+        CreateMap<CreateHistoryCommand, EnvelopeHistory>();
     }
 }