Documentation misses CachedClassProps

[0Hughman0]

The accessors continue to cause chaos.

Sphinx autodoc doesn't manage to generate docstrings for any CachedClassProps, presumably because it just gets those attributes from the class, which get returned as the cached value.

This means things like TierBase.name_part_template are missing from the docs - they're important!

A solution may be found add some sort of preprocessor or whatever to Sphinx:

https://www.sphinx-doc.org/en/master/usage/extensions/autodoc.html#event-autodoc-process-docstring

The CachedClassProps can be fetch from the classes using the syntax (which bypasses the accessor protocol):

>>> TierBase.__dict__['name_part_template']
CachedClassProp

and it seems the wraps is passing on the correct docstring. So it should be possible to generate the docstring I think, provided we can find a way to get the right object to Sphinx.