Interface ResolvedMetadataEntry

Optional longer (up to ~300 chars) editorial summary lifted from the language-specific executive brief BLUF paragraph. Used for og:description and twitter:description so social-card previews can show the full Bottom-Line-Up-Front context, while the short description stays within Google's ~160-char snippet budget. Empty string when no longer summary is available — the caller should then fall back to description.

"localized-brief" when the title/description came from a translated executive-brief_<lang>.md; "english-brief" when the locale fell through to the English brief; "english-editorial" when the locale used an aggregated-Markdown / artefact source; "template" when only the localized type/date template was available. For lang === 'en' the value is always "english-brief" or "english-editorial" or "template" (no fall-through). Lets downstream consumers — the news-index, the static-site fallback note, the manifest-SEO validator — record the asymmetry called out in .github/prompts/04-article-generation.md § 6.2 priority 3.