Revert "Refactor envelope handling to use ISQLExecutor"

This reverts commit 4cabaf3191.

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeCommandHandler.cs

@@ -9,18 +9,18 @@ namespace EnvelopeGenerator.Application.Envelopes.Commands;
 /// </summary>
 public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeCommand, CreateEnvelopeResponse?>
 {
-    private readonly ISQLExecutor _executor;
+    private readonly IEnvelopeExecutor _envelopeExecutor;
 
     private readonly IMapper _mapper;
 
     /// <summary>
     /// 
     /// </summary>
-    /// <param name="executor"></param>
+    /// <param name="envelopeExecutor"></param>
     /// <param name="mapper"></param>
-    public CreateEnvelopeCommandHandler(ISQLExecutor executor, IMapper mapper)
+    public CreateEnvelopeCommandHandler(IEnvelopeExecutor envelopeExecutor, IMapper mapper)
     {
-        _executor = executor;
+        _envelopeExecutor = envelopeExecutor;
         _mapper = mapper;
     }
 
@@ -34,7 +34,7 @@ public class CreateEnvelopeCommandHandler : IRequestHandler<CreateEnvelopeComman
     {
         int userId = request.UserId ?? throw new InvalidOperationException("UserId cannot be null when creating an envelope.");
 
-        var envelope = await _executor.CreateEnvelopeAsync(userId, request.Title, request.Message, request.TFAEnabled, cancellationToken);
+        var envelope = await _envelopeExecutor.CreateEnvelopeAsync(userId, request.Title, request.Message, request.TFAEnabled, cancellationToken);
 
         return _mapper.Map<CreateEnvelopeResponse>(envelope);
     }