Update the nightly workflow quality gates script invocation to use
--coverage-min 97 instead of --coverage-min 85, aligning it with the
project's required COVERAGE_THRESHOLD = 97 defined in noxfile.py.
Also update the consolidated_config.feature BDD scenario to assert
the nightly workflow uses at least 97% (not 85%) to properly enforce
the coverage threshold requirement.
ISSUES CLOSED: #2769
freemo