refactor(ruff): multiple changes to clear ruff issues Fix a couple of missing returns of booleans for security checks. Turns an implicit return None into an explicit return False. Fix loop index variable being reassigned inside loop by renaming index variable. 2 instances. Consolidate 2 isinstance calls to 1 with tuple class argument. Replace dict(list comprehension) with dict conprehension. Variable renames. Removal of unused variable. Whitespace fixes. sort imports

# https://issues.roundup-tracker.org/issue2551278
# datetime.utcnow deprecated
try:
    from datetime import UTC, datetime

    def utcnow():
        return datetime.now(UTC)

except ImportError:
    from datetime import datetime

    def utcnow():
        return datetime.utcnow()