Use time.Time for logging

sshmux.go

@@ -278,13 +278,13 @@ func (s *Server) ListenAddr(address string) error {
 				logger = slog.New(slog.NewJSONHandler(*s.LogWriter, nil))
 			}
 			logger = logger.With(
-				slog.Int64("connect_time", time.Now().Unix()),
+				slog.Time("connect_time", time.Now()),
 				slog.String("remote_ip", conn.RemoteAddr().String()),
 				slog.String("client_type", "SSH"),
 			)
 			defer func() {
 				session.Close()
-				logger.Info("SSH proxy session", slog.Int64("disconnect_time", time.Now().Unix()))
+				logger.Info("SSH proxy session", slog.Time("disconnect_time", time.Now()))
 			}()
 			attrs, err := s.RunPipeSession(session)
 			if err != nil {