Solution
The shutdown permission setting is retained after applying a system image, so it does not need to be reconfigured each time.
The command described in the article: usermod -a -G shutdown lvuser
The command modifies /etc/group and adds lvuser to the shutdown group. A retrieve operation was performed after applying this setting, and the resulting system image was checked to confirm that the permission setting was preserved. In addition, after deploying the retrieved system image to another target, the shutdown permission was still correctly configured.