Dear Maintainer(s),

sysusers.d config files allow a package to use declarative
configuration instead of manually written maintainer scripts. This
also allows image-based systems to be created with /usr/ only, and
also allows for factory resetting a system and recreating /etc/ on
boot.

https://www.freedesktop.org/software/systemd/man/latest/sysusers.d.html

Please find patches attached to stop deleting the system user on
removal, which is widely considered bad practice, as the kernel
recycles UIDs/GIDs, and to rely on the upstream
(patched) sysusers.d for the postinst setup.