[lukisch]

Summary

• CI-Matrix Härtung: Python 3.13 zur Testmatrix in .github/workflows/tests.yml hinzugefügt (Ubuntu, Windows, macOS). Linter-Schritt mit
  uff check absorber tests ergänzt.
• PEP 621 Metadaten: Python 3.13 Classifier, Repository- und Changelog-URLs sowie [tool.ruff]-Konfiguration in pyproject.toml ergänzt.
• Vertragstest-Erweiterung: ests/test_contract.py hinzugefügt (prüft PEP 621 Metadaten, Versionsparität, Lizenzdateien und Konfigurationsvertrag).
• Dokumentation: Testzähler in README.md und README_de.md von 115 auf 119 Tests synchronisiert; CHANGELOG.md unter ## [Unreleased] aktualisiert (kein Versionsbump).

Quality Gates

• pytest: 118 passed, 1 skipped (119 collected)
• pyright: 0 errors, 0 warnings

uff check: All checks passed

[ellmos-multi-bot]

Independent review by a separate Codex instance (runtime model identifier not exposed), exact head d1b65dc. Read the complete six-file diff, adjacent tests, configuration/core/naming, workflow, packaging metadata and English/German/license documents. No blocking findings. Existing assertions are unchanged; four additive contract tests agree with parsed TOML and built wheel metadata. Local Windows Python 3.12 QA: socket connections denied, GUI test module excluded by scope, 96 passed and 1 skipped (Windows symlink privilege 1314); ruff check absorber tests passed; pyright with the explicit isolated-venv Python reported 0 errors/0 warnings; isolated wheel build and METADATA/classifier/URLs/entrypoint/MIT-notice checks passed. CI run 41168464810 is successful at this head: all three Windows jobs 119 passed, all six Ubuntu/macOS jobs 118 passed/1 platform skip; Ubuntu 3.12 lint/type logs passed. No GUI, real-data, provider or manual CI starts. This reviews the source/CI change, not binary-release legal compliance or device acceptance. Existing setuptools PEP-639 deprecation warnings and dated dependency inventory remain follow-up maintenance.