Summary

• remove tracked MATLAB files, MATLAB-specific CI workflows, MATLAB parity tooling, and tracked raw example data from nSTAT-python
• sanitize all retained notebooks so they present as Python-native examples rather than MATLAB-derived artifacts
• add a Python-only notebook smoke group to CI and document Python-native example-data installation

Commits

• c9304b0 Remove MATLAB files and CI from nSTAT-python
• e2923eb Sanitize notebooks and add Python-only notebook smoke

Validation

• python3 -m pytest -q -> 17 passed
• python3 tools/notebooks/run_notebooks.py --group ci_smoke --timeout 600 -> passed
• git ls-files '*.m' '*.mlx' '*.mat' data -> no tracked MATLAB/code/raw-data files

Notes

• This PR keeps the existing Python compatibility adapters for now, including nstat.compat.matlab, because they are Python shim code rather than MATLAB files.
• The repo now relies on nstat-install / ensure_example_data() for example-data installation instead of tracked data/ assets.