Document prod schema migrate before restore and i18n search index fix.

Release runbook now describes default migrateProdSchema, auto-migrate safety guard, and troubleshooting for updated_at restore failures; i18n docs cover partial entity_translations index.

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

Documentation/setup.md

@@ -272,6 +272,8 @@ After clone: copy `.env.example` → `.env`, install dependencies, run [one-time
 | **Back to Timeline** returns to gallery / previous wing | Stale client build | Pull latest client — `goToTimelineHome()` unmounts the hall and resets timeline zoom |
 | Catalog search dropdown hidden under timeline | Stale client CSS | Rebuild client — `.site-header` uses `z-index: 110` above the sticky timeline bar |
 | Catalog search returns empty / 500 | Search indexes missing | Run `npm run dev:migrate` (includes `migrate-search.sql`) or `npm run dev:migrate:search`; restart API |
+| `fetch-artist-bios-ru` fails: `index row size … exceeds btree maximum` | Old `entity_translations` index on all `value` text | `npm run dev:migrate` (partial search index on name/title only), then re-run `npm run dev:fetch-artist-bios-ru` |
+| Russian UI shows English catalog names | Translations not published | Curator → Translations → Publish; public API serves only `status = published` |
 | Frame still black after **Checked** | Gallery session not synced | Re-enter hall or toggle debug **Checked** from detail with gallery open behind overlay |
 | Duplicate works in gallery / timeline | Double import or variant Wikipedia titles | `npm run dev:find-duplicates`; merge or delete spare rows manually |
 | **Failed to load movement gallery** / `Cannot GET /api/movements/:id/gallery` | Stale server process missing route | Restart `npm run dev:web` or `npm run dev:server` after pulling API changes |