* docs(release): prepare v1.38.9 notes

Summary:
Generate a bilingual, product-focused draft from merged pull request metadata. Reuse the selected release-bound PR when one is available.

Verification:
Validate the catalog, citations, bilingual fields, and rendered GitHub release notes before committing.

* docs(release): restore v1.38.9 upgrade notes after regeneration

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: SivanCola <32437197+SivanCola@users.noreply.github.com>