renpy.random/random get choices, sample, randrange and Random(seed); frozenset, iter and hash
are builtins. User classes may define __hash__ (dict keys), __iter__, __getitem__ and
__contains__; the converter accepts them instead of rejecting the whole class, which
removes the Perk/Skill/Status wall in SaintlyCorruption.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>