/usr/lib/x86_64-linux-gnu/libpqtypes.so is in libpqtypes-dev 1.5.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpqtypes.so.0.1.5
/usr/lib/x86_64-linux-gnu/libpqtypes.so.0.1.5