feat(controller): add endpoint to retrieve last used receiver name by email

- Implemented `Get` endpoint in `EnvelopeReceiverController` to fetch the last used receiver's name by email.
- Added handling for successful and failed responses, including proper status codes and logging.

EnvelopeGenerator.Infrastructure/Repositories/EnvlopeReceiverRepository.cs

@@ -78,7 +78,7 @@ namespace EnvelopeGenerator.Infrastructure.Repositories
 
         public async Task<EnvelopeReceiver?> ReadLastByReceiver(string email)
         {
-            return await _dbSet.Where(er => er.Receiver!.EmailAddress == email).LastOrDefaultAsync();
+            return await _dbSet.Where(er => er.Receiver!.EmailAddress == email).OrderBy(er => er.EnvelopeId).LastOrDefaultAsync();
         }
     }
 }