Update buildpack to use pgbouncer 1.23.1

[xiaolin-ninja]

https://www.pgbouncer.org/2024/08/pgbouncer-1-23-1
https://www.pgbouncer.org/2024/07/pgbouncer-1-23-0

Notable changes since last update (1.17):

• User Name Maps for Authentication Configuration (1.23.0)
• Allows specifying user name maps in the authentication configuration.
• Rolling Restarts (1.23.0) [ minor breaking change. Now use SIGQUIT instead of SIGTERM ]
• Improved support for handling replication connections through PgBouncer. (1.23.0)
• Introduced track_extra_parameters, allowing the tracking of more parameters in transaction pooling mode. (1.22.0)
• SQLSTATE codes are now forwarded during the authentication phase, enhancing error handling. (1.22.0)
• Allows the use of the PGOPTIONS environment variable to set PostgreSQL parameters at startup. (1.22.0)
• Added IntervalStyle to the tracked parameters by default. (1.22.0)

[troycoll]

Dev environment testing:
Follow these instructions to add pgbouncer buildpack to an app
Provision a Postgres standard-0
heroku logs -t -a app-name to tail the app's logs:

2024-08-12 16:37:51.924 UTC [21] LOG C-0x55b25cfef7f0: db2/[email protected]:54292 login attempt: db=db2 user=u3892olehdosl0 tls=no replication=no
2024-08-12T16:37:51.943547+00:00 app[pg_driver.1]: 2024-08-12 16:37:51.943 UTC [21] LOG S-0x55b25cff8190: db2/[email protected]:5432 new connection to server (from 172.18.33.46:51658)
2024-08-12T16:37:51.952458+00:00 app[pg_driver.1]: 2024-08-12 16:37:51.952 UTC [21] LOG S-0x55b25cff8190: db2/[email protected]:5432 SSL established: TLSv1.3/TLS_AES_256_GCM_SHA384/ECDH=prime256v1

[coreypurcell]

seems fine, but do we need to do anything to support the PGOPTIONS changes?

[troycoll]

@coreypurcell I'm not sure if we want to do that, given that PGOPTIONS supports a dynamic list of parameters via the track_extra_parameters field in PgBouncer config. We can always make additions to PgBouncer config env vars or PgSettings if there are specific requests.

[troycoll]

@edmorley this is ready to release at your convenience!

[edmorley]

Please can I have a review for #196.

[edmorley]

Released :-)
#196 (comment)