/usr/ is in libpreludedb7-pgsql 4.1.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libpreludedb/
/usr/lib/x86_64-linux-gnu/libpreludedb/plugins/
/usr/lib/x86_64-linux-gnu/libpreludedb/plugins/sql/
/usr/lib/x86_64-linux-gnu/libpreludedb/plugins/sql/pgsql.so
/usr/share/
/usr/share/doc/
/usr/share/doc/libpreludedb7-pgsql/
/usr/share/doc/libpreludedb7-pgsql/copyright
/usr/share/libpreludedb/
/usr/share/libpreludedb/classic/
/usr/share/libpreludedb/classic/pgsql-update-14-1.sql
/usr/share/libpreludedb/classic/pgsql-update-14-2.sql
/usr/share/libpreludedb/classic/pgsql-update-14-3.sql
/usr/share/libpreludedb/classic/pgsql-update-14-4.sql
/usr/share/libpreludedb/classic/pgsql-update-14-5.sql
/usr/share/libpreludedb/classic/pgsql-update-14-6.sql
/usr/share/libpreludedb/classic/pgsql-update-14-7.sql
/usr/share/libpreludedb/classic/pgsql.sql
/usr/share/doc/libpreludedb7-pgsql/changelog.Debian.gz