Windows image migraton

[HenrZu]

Motivation / Current Behaviour

See: https://github.blog/changelog/2026-02-05-github-actions-early-february-2026-updates/#windows-server-2025-with-visual-studio-2026-image-now-available-for-github-hosted-runners

Windows-latest and windows-2025 will use vs2026 by default soon.

Enhancement description

See motivation. Prepare for new images

Additional context

No response

Checklist

• Attached labels, especially loc:: or model:: labels.
• Linked to project