/usr/share/doc/libapq-dbg/changelog.Debian.gz is in libapq-dbg 3.2.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libapq-dbg/../libapq3.2.0.1/changelog.Debian.gz
/usr/share/doc/libapq-dbg/../libapq3.2.0.1/changelog.Debian.gz