Dataclass doesn't call original `__init__` (#3818)
* test case
* and the fix itself
* Apply suggestions from code review
Co-authored-by: Lucain <lucainp@gmail.com>
* claude suggestions + adjust test for defaults
* ignore type
* Apply suggestion from @Wauplin
---------
Co-authored-by: Lucain <lucainp@gmail.com>
Co-authored-by: Lucain <lucain@huggingface.co>
