refactor: remove old IE conditional comments and meta tag.
build(deps): bump zizmorcore/zizmor-action from 0.6.2 to 0.6.3
build: brotli not thread safe
bug: fix reference to property.
chore(ruff): configuration.py ruff cleanup.
validate LOGGING_LEVEL setting.
alphabetize exceptions, add docstrings
feature: add checkconfig to roundup-admin.