add common constraint for hierarchical nodes

[wvandeun]

No description provided.

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch wvd-20251125-same-parent-constraints-for-hierarchical-nodes

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[codspeed-hq]

CodSpeed Performance Report

Merging #7749 will not alter performance

_{Comparing wvd-20251125-same-parent-constraints-for-hierarchical-nodes (d9689aa) with release-1.6 (c654060)}

Summary

✅ 12 untouched