Dirty REST for Postgres Role Information

Description

Source Code: bgw_role_rest

This experimental extension was developed as a training material for building Postgres extensions that spawn background workers.

The reason of the REST response, is for integrating with Load Balancers that support REST endpoints for getting the node status. Within this, it was possible to point the LB to the correct node once promoted, by pointing to the exposed endpoint by the Postgres node.

This mimics the Patroni API endpoint for the leader status in a rustic manner. There was no intention to make this extensions for a production stage, the solely purpose was to have an example beyond a "Hello, world!".