feat(EnvelopeGenerator.Terminal): Downgrade to .net 7

EnvelopeGenerator.Terminal/CommandManager.cs

@@ -7,12 +7,20 @@ using System.Text.Json;
 
 namespace EnvelopeGenerator.Terminal;
 
-public class CommandManager(IEnvelopeReceiverService envelopeReceiverService, IMediator mediator)
+public class CommandManager
 {
     private static JsonSerializerOptions Options = new ()
     {
-        WriteIndented = true // <-- Bu satır okunabilir JSON için önemli
+        WriteIndented = true
     };
+    private readonly IEnvelopeReceiverService _envelopeReceiverService;
+    private readonly IMediator _mediator;
+
+    public CommandManager(IEnvelopeReceiverService envelopeReceiverService, IMediator mediator)
+    {
+        _envelopeReceiverService = envelopeReceiverService;
+        _mediator = mediator;
+    }
 
     [DefaultCommand]
     public void Execute([Option(Description = "print envelope generator termianal version.")] bool version)
@@ -22,13 +30,13 @@ public class CommandManager(IEnvelopeReceiverService envelopeReceiverService, IM
     }
 
     [Subcommand]
-    public IEnvelopeReceiverService EnvelopeReceiver => envelopeReceiverService;
+    public IEnvelopeReceiverService EnvelopeReceiver => _envelopeReceiverService;
 
     [Command]
     public async Task ReadDocument(IConsole console, int? id = null, int? envelopeId = null)
     {
         ReadDocumentQuery query = new(id, envelopeId);
-        var document = await mediator.Send(query);
+        var document = await _mediator.Send(query);
         console.WriteLine(JsonSerializer.Serialize(document, Options));
     }
 }