PgUtil.post returns the inserted entity, but it returns the entity data before any INSERT triggers were applied. Returning this data doesn't make sense because the client already knows them.
Change the SQL to INSERT ... RETURNING jsonb so that it returns that entity data after the INSERT triggers were applied. This is very fast and avoids an additional SELECT round-trip.
This was requested on https://github.com/folio-org/mod-inventory-storage/pull/327/files#r326601328