feat: migrate production schema from OMW to Kaikki flat vocabulary model

- Replace terms/translations/term_glosses/term_examples with vocabulary_entries
  and entry_translations
- Remove decks, topics and related tables (deferred)
- Add cefr_level and difficulty to entry_translations for game query filtering
- Update termModel.ts for new schema — getDistractors now takes sourceLanguage
- Update gameService.ts and multiplayerGameService.ts for entryId rename
- Update all test fixtures from termId to entryId
- Generate and apply migration 0011

apps/api/src/services/gameService.ts

@@ -38,8 +38,9 @@ export const createGameSession = async (
   const questions: GameQuestion[] = await Promise.all(
     terms.map(async (term) => {
       const distractorTexts = await getDistractors(
-        term.termId,
+        term.entryId,
         term.targetText,
+        request.source_language,
         request.target_language,
         request.pos,
         request.difficulty,