pg-configurator copyright and provenance notice

This repository contains work originally developed by Oleg Gurov and Tantor
Labs. The original copyright notices are retained in LICENSE. The project is
distributed under the MIT License; publishing it from the O2eg repository does
not remove or transfer those historical notices.

The bundled pg_settings_history CSV files are generated PostgreSQL server
configuration snapshots. No third-party workload datasets or binary assets are
distributed by this package.
