feat(astro:db): add docs for getDbError()

[ArmandPhilippot]

Description (required)

Adds docs for the new getDbError() helper added to astro:db in withastro/astro#16289 and released in withastro/astro#16467

Related issues & labels (optional)

• Docs for fix: bump drizzle-orm version for CVE-2026-39356 astro#16289
• Suggested label: add new content

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Tracked Files

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en/guides/integrations-guide/db.mdx	Source changed, localizations will be marked as outdated.

Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[yanthomasdev]

Good work @ArmandPhilippot! LGTM!