Refaktorisierung von HomeController, um die Verwendung von ThenAsync zu integrieren und Codelesbarkeit zu verbessern.

EnvelopeGenerator.Application/DTOs/EnvelopeReceiverDto.cs

@@ -12,6 +12,6 @@ namespace EnvelopeGenerator.Application.DTOs
         string? PrivateMessage,
         DateTime AddedWhen,
         DateTime? ChangedWhen,
-        Envelope? Envelope,
-        Receiver? Receiver);
+        EnvelopeDto? Envelope,
+        ReceiverDto? Receiver);
 }

EnvelopeGenerator.Application/Services/EnvelopeReceiverService.cs

@@ -99,7 +99,7 @@ namespace EnvelopeGenerator.Application.Services
             (string? uuid, string? signature) = envelopeReceiverId.DecodeEnvelopeReceiverId();
 
             if (uuid is null || signature is null)
-                return Result.Fail<bool>();
+                return Result.Fail<bool>().Notice(LogLevel.Warning, EnvelopeFlag.NonDecodableEnvelopeReceiverId, "In IsExisting(string envelopeReceiverId)");
 
             int count = await _repository.CountAsync(uuid:uuid, signature:signature);
             return Result.Success(count > 0);