/usr/share/doc/libmariadb-client-lgpl-dev-compat/changelog.Debian.gz is in libmariadb-client-lgpl-dev-compat 2.0.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmariadb-client-lgpl-dev-compat/../libmariadb2/changelog.Debian.gz