help(MyMessage) crashes

[matt-rndbt]

Summary

Calling help(MyMessage) throws an error

/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/pydoc.py:350: in classify_class_attrs
    for (name, kind, cls, value) in inspect.classify_class_attrs(object):
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/inspect.py:714: in classify_class_attrs
    srch_obj = getattr(srch_cls, name, None)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
src/betterproto2/utils.py:15: in __get__
    return self.__func__(type)
           ^^^^^^^^^^^^^^^^^^^
src/betterproto2/__init__.py:719: in _betterproto
    cls._betterproto_meta = ProtoClassMetadata(cls)
                            ^^^^^^^^^^^^^^^^^^^^^^^
src/betterproto2/__init__.py:494: in __init__
    assert dataclasses.is_dataclass(cls)
           ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^

Unrelatedly, I updated the test readme with the correct command name get-local-compiled-tests

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
  • This change has an associated test.
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)