[feature] : Convert img_path to Path object when loading .topostats files

[ns-rse]

Is your feature request related to a problem?

In TopoStats #1082 we pull the data out of the returned tuple and build a dictionary with filename as key and the returned data as a topostats_object.

This required converting img_path which is part of the returned dictionary to Path() so that it is handled correctly (this is the expected type when processing end-to-end). See line 802 of io.py in the linked pull request.

Describe the solution you would like.

AFMReader should ensure the img_path field of the loaded dictionary is of type Path before returning the data.

We should add a line to AFMReader.topostats.load_topostats() to convert this field.

    try:
        with h5py.File(file_path, "r") as f:
            data = unpack_hdf5(open_hdf5_file=f, group_path="/")

            data["img_path"] = Path(data["img_path"])  # Convert img_path
            file_version = data["topostats_file_version"]
            logger.info(f"[{filename}] TopoStats file version : {file_version}")
            image = data["image"]
            pixel_to_nm_scaling = data["pixel_to_nm_scaling"]

Describe the alternatives you have considered.

Leave conversion in TopoStats and users to convert if required. 🤷

Sample Image

N/A

Additional context

No response