- Remove body_html from _sync_static_articles INSERT (no such column in articles table)
- Remove empty report_q1_stat*_unit keys from EN+DE locales (i18n parity test forbids empty values)
- Update report_landing.html to remove stats-strip__unit spans referencing deleted keys
- Fix 0020_articles_unique_url_language migration to preserve group_key when recreating articles table (migration clobbered the column added by the preceding 0020_articles_group_key migration)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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