Cedar-backup3

* Pull in latest updates from run-script-framework.
* Simplify GHA integration with coveralls.io.
* Clarify that Debian stable is the target for dependencies.
* Update transitive dependencies to address Dependabot warnings.
* Add support for Python v3.13 and drop support for v3.9.
* Upgrade to Poetry v1.8.4 for official Python 3.13 support.
* Bump readthedocs build to python 3.10 and ubuntu-24.04.
* Adjust getFunctionReference() to use Python 3 callable().
* Convert to posixpath.isabs() to work around change in Python v3.13.

* 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* Add support for 'run outdated' and update dependencies.

* Constrain some dependencies to be compatible with Debian.
* Disable intersphinx plugin for docs, which no longer seems to work.
* Update jinja2 to address CVE-2024-22195 from Dependabot.

* Update urllib3 to address Dependabot warnings.
* Upgrade to Poetry v1.7.0 for official Python 3.12 support.

* Fix Python 3.12 deprecation for datetime.datetime.utcnow().
* Fix Python 3.12 warning for tar.extract() filter behavior.
* Fix some non-working remote connectivity tests in 'run tests full'.

* Upgrade major dependencies.
* Upgrade build process to Poetry v1.6.1.
* Add support for Python v3.12 and drop support for v3.8.
* Document changes to scp configuration for Debian bookworm.