url_path UNIQUE prevented multilingual generation — the second language
(e.g. EN after DE) always failed with UNIQUE constraint, leaving tasks in
a retry loop and only the first 1-2 articles visible.
Migration 0020 recreates the articles table with UNIQUE(url_path, language)
and adds a composite index. Adds idx_articles_url_lang for the new lookup
pattern used by article_page and generate_articles upsert.
Also adds search/country/venue_type filters to the admin Scenarios tab
and clarifies what "Published Scenarios" means in the subtitle.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
3d99b8c375