fix(news): give MSS 2026 a card excerpt / meta description

The Meet Student Slovenia 2026 news card had an empty description because the
auto-extractor looks for the first <p> right after .news-article-body, but that
page starts with the sticky-CTA <a>, so nothing matched. Add a curated
description (EN/MK/SI) via seo_inject DESC_OVERRIDES; this now fills the meta
description, OG/Twitter/JSON-LD, the News-hub card excerpt, and llms.txt.
MK/SI copy AI-drafted — flag for native review.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

llms.txt

@@ -64,7 +64,7 @@ AI summary: https://msosorg.com/links-for-bots/about-msos/
 
 ## News
 - [News and updates](https://msosorg.com/en/news/): Everything new at MSOS in one place — events and projects, blog stories, announcements and official updates for Macedonian students in Slovenia.
-- [Meet Student Slovenia 2026](https://msosorg.com/en/news/meet-student-slovenia-2026/)
+- [Meet Student Slovenia 2026](https://msosorg.com/en/news/meet-student-slovenia-2026/): Future students and their parents talk directly with Macedonian students already studying in Slovenia. Meet Student Slovenia 2026 — 4 September in Skopje and online.
 - [Proof-of-means amount updated to €507,43 per month](https://msosorg.com/en/news/proof-of-means-updated-2026/): If you are applying for or renewing a student residence permit in Slovenia, you must prove you have enough money to support yourself. That requirement is tied…
 
 ## Events & projects