* Minor improvements to unit tests based on code review.
* Upgrade to Poetry v1.8.0 and make related adjustments.
* Disable Python keyring via poetry.toml.
* Update Poetry install instructions in DEVELOPER.md.
* Pull in latest version of run-script-framework.
* Upgrade to gha-shared-workflowsv4 with new Poetry setup.
* Add support for 'run outdated' and update dependencies.