[denialhaag]

Description

🤖 AI text below 🤖

Update reusable workflows to v2.5.0. Use clang-tidy 23 with the updated Ubuntu 26.04 runner and adapt the C++ sources to its diagnostics. Enable automatic Python stub updates.

AI notice

This PR and its contents were created with the assistance of GPT-6 Astra via Codex.

Checklist

• The pull request only contains commits that are focused and relevant to this change.
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[burgholzer]

LGTM