Bulk update page metadata

You can now update page-level metadata for up to 100 pages in a single request using the new bulk update page metadata endpoint.

Batch updates: Update title, slug, seo, and openGraph fields for multiple pages at once.
Localization support: Target different secondary locales by including a localeId per page entry. The same page ID can appear multiple times with different locales.
Validation: Duplicate id + localeId combinations return a 400 error. All pages must belong to the same site.