Comment 17 for bug 1824000

These files are created by snapd with permission 0644, as can be seen here: https://github.com/snapcore/snapd/blob/master/advisor/backend.go#L71

Additionally, I don't see anything in the maintainer scripts for snapd debian package which would change that permission, so I'm led to believe that the explanation given earlier about the umask being set differently causes apt to re-create the permissions on these files is the root cause.

As such, marking snapd as Invalid for this package.