Was linking to /news?category=Featured which silently fell back to the
unfiltered /news listing because "Featured" isn't in CATEGORIES and the
filter is tag-based, not category-column-based.
Adds getLegacyFeaturedArticles() that mirrors FeaturedBento's query
(category ILIKE 'featured', featured-flag-first sort) at limit 200, and
a thin /news/featured route that reuses NewsPageClient.
