?translatable now supported on Get Page Metadata

Get page metadata now accepts translatable, alongside the endpoints that already supported it:

Pass the id of the secondary locale you’re translating into to omit page-level fields (title, slug, SEO title/description, Open Graph title/description) excluded from translation for that locale — they’re left out of the response entirely rather than returned as null. Behavior matches the other endpoints: the value must be a secondary locale id (400 otherwise), and the request returns a 403 if translation exclusions aren’t enabled for the site.