These extensions are pre-packed and included in the local yum repo, which can be enabled by configuration.
Only core extentensions are installed by default, which are: pg_repack, wal2json, postgis33, timescaledb, citus, pgvector.
And the only extension activated (`CREATE EXTENSION`) by default is pg_repack.
The AGPLv3 is infected by the Grafana, MinIO and citus.
https://github.com/Vonng/pigsty/blob/master/docs/PGSQL-EXTEN...