/usr/lib/x86_64-linux-gnu/libfa.so is in libaugeas-dev 1.10.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfa.so.1.5.1
/usr/lib/x86_64-linux-gnu/libfa.so.1.5.1