Legacy article HTML SEO repair helpers, factored out of
news-indexes.ts (Refactor 8/8). All public names (applyArticleSeoBackfill,
backfillLegacyArticleSeo, healJsonLdDescriptionCorruption,
backfillArticleHreflang, buildLegacyBackfillDescription) keep their
original exported signatures so the regression test suites in
test/unit/news-indexes-*.test.js keep importing from the barrel.
Description
Legacy article HTML SEO repair helpers, factored out of
news-indexes.ts(Refactor 8/8). All public names (applyArticleSeoBackfill,backfillLegacyArticleSeo,healJsonLdDescriptionCorruption,backfillArticleHreflang,buildLegacyBackfillDescription) keep their original exported signatures so the regression test suites intest/unit/news-indexes-*.test.jskeep importing from the barrel.