Class WithAnyField

tests/python/utils/test_unpack_dataclass.py:153–155

    # Dynamic dispatch: Any-typed field receives a dataclass at runtime
    @dataclasses.dataclass
    class WithAnyField:
        data: Any
        scale: int

    # data is Any -> schema marks it as "unpack" -> __dispatch called at runtime
    # When data is a dataclass, it should be recursively unpacked