Plan upgrade path to latest version of Postgres 14

14.7 is the latest version as of time of writing.

Part of #587 Epic: 'Upgrade of Postgres server to latest 14.x minor revision'

Prerequisite of #590 'Research Postgres 15 server enhancements'

Tasks:

1. Review Postgres changelog for each minor version on the 14.x series
2. See #511 for version 14.5, which is the starting point.
3. Create tickets for 14.6 and 14.7 based on the outcome of point 1.
4. Compose a consolidated plan to do all minor version upgrades in a single maintenance event