Log Message:
py-elementpath: updated to 4.8.0

`v4.8.0`_ (2025-03-03)

* Add full PSVI type labeling in XDM to solve type errors with XSD 1.1 assertions
* Add *schema* optional argument to dynamic context
* Add a RootToken as a proxy of the parsed token tree for compatibility with \ 
xmlschema<=3.4.3
* Extend XDM to split ElementTree/lxml processing from schema nodes and to allow \ 
future extensions