[tducret]

Summary

• Add explicit Python 3.11, 3.12, 3.13 and 3.14 classifiers to match the existing CI test matrix.
• Keep the generic Python 3 classifier and existing Python requirement unchanged.

This is a metadata-only improvement for PyPI discovery and advertised support. Classifiers do not affect pip wheel selection or produce binary wheels.

Validation

• Parsed pyproject.toml with tomllib and verified all four version classifiers.
• git diff --check passed.
• Runtime tests not run: no runtime code changed.