Make data input to _compose_parser optional

[bruno-f-cruz]

Fixes an issue where the inner callable from _compose_parser was not allowing the data input to be optional.

harp-python/harp/reader.py

Lines 79 to 97 in 9d05b58

	def _compose_parser(
	f: Callable[[DataFrame], DataFrame],
	g: Callable[..., DataFrame],
	params: _ReaderParams,
	) -> Callable[..., DataFrame]:
	def parser(
	data,
	columns: Optional[Axes] = None,
	epoch: Optional[datetime] = params.epoch,
	keep_type: bool = params.keep_type,
	):
	df = g(data, columns, epoch, keep_type)
	result = f(df)
	type_col = df.get(MessageType.__name__)
	if type_col is not None:
	result[MessageType.__name__] = type_col
	return result
	return parser

This allows g aka _create_register_reader to take care of the path inference logic

Closes #45

[bruno-f-cruz]

@glopesdev Some notes:

1. Not sure this is the best way to create the unit test, but it is the one I think reuses the assets in tests the most efficiently.
2. I ended up fixing a pyright test fail due to an internal import of a pandas type. I checked and I don't think that there is a way to avoid the import, so I just muted it. It may be worth generating a uv.lock file for this library as I think the problem likely stems from a recent upgrade to pyright.