Docs: retire backups billing FAQ

[Blargian]

Retires the temporary ClickHouse Cloud backups billing discrepancy FAQ after the July 1, 2026 billing correction has been live for a complete billing cycle. The page is removed from the Cloud navigation, and both its current and legacy URLs now redirect to the backups overview.

Changelog category (leave one):

• Documentation (changelog entry is not required)

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Not applicable.

[clickhouse-gh]

Workflow [PR], commit [d9bd300]

Summary: ✅

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AI Review

Summary

This PR removes the English backups/faq page, drops it from the English Cloud navigation, and redirects the English current and legacy URLs to backups/overview. The retirement is incomplete, though: the translated FAQ variants are still published, so non-English users can still land on the outdated billing notice.

Findings

⚠️ Majors

• [docs/_site/redirects.json:3] The FAQ retirement is only implemented for the English route. Locale navigation files such as docs/ja/products/cloud/navigation.json:91 still publish .../backups/faq, the locale FAQ documents are still present, and some locale legacy redirects (for example "/jp/cloud/features/backups/faq") still lead to locale FAQ pages instead of the overview. That leaves the outdated July 2026 billing notice live for translated docs even though the PR claims the page is retired.
  Suggested fix: retire the locale variants in the same change by removing the locale navigation entries and redirecting or deleting the locale FAQ pages, or narrow the PR/body so it no longer claims the FAQ is retired globally.

Final Verdict

Changes requested. The English page is retired, but the translated FAQ variants are still live.

[Blargian]

Note to self: merge on August 15th

[clickhouse-gh]

This only retires the English FAQ route. The locale variants are still published: the nav files under docs/{ar,es,fr,ja,ko,pt-BR,ru,zh}/products/cloud/navigation.json still include backups/faq, the corresponding locale faq.mdx files are still present, and some locale legacy redirects still land on them (for example "/jp/cloud/features/backups/faq" still redirects to "/ja/products/cloud/features/backups/faq"). That leaves the outdated July 2026 billing notice live for translated docs, so the PR does not actually remove the FAQ or redirect all current/legacy URLs to backups/overview.