Add Russian i18n with DB translations, locale API, and curator review UI.

UI chrome via react-i18next, catalog text in entity_translations with ru.wikipedia seeding, locale-aware search, and Translations page for publish workflow.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -30,6 +30,9 @@
     "dev:migrate:artist-palette": "node scripts/migrate-artist-palette.js",
     "dev:migrate:search": "node scripts/migrate-search.js",
     "dev:migrate:sync-timestamps": "node scripts/migrate-sync-timestamps.js",
+    "dev:migrate:i18n": "node scripts/migrate-i18n.js",
+    "dev:fetch-artist-bios-ru": "node scripts/fetch-artist-bios-ru.js",
+    "dev:import-translations": "node scripts/import-translations.js",
     "dev:backfill-updated-at": "node scripts/backfill-updated-at.js",
     "dev:import-painter-palette": "node scripts/import-painter-palette.js",
     "dev:analyze-painter-palette": "node scripts/analyze-painter-palette.js",