* fix: CallbackData set optional as None
* docs: add fix changelog
* Add support for nullable fields in callback data
This update extends the callback data handling by adding support for nullable fields. The code now uses the Python typing structures `Optional` and `Union` to parse such fields correctly. A helper function `_check_field_is_nullable` has been added to assist in efficiently checking if a given field is nullable.
* Add support for nullable fields in callback data
This update extends the callback data handling by adding support for nullable fields. The code now uses the Python typing structures `Optional` and `Union` to parse such fields correctly. A helper function `_check_field_is_nullable` has been added to assist in efficiently checking if a given field is nullable.
---------
Co-authored-by: JRoot Junior <jroot.junior@gmail.com>
