feat(db): complete deck generation script for top english nouns

- add deck_terms to schema imports
- add addTermsToDeck — diffs source term IDs against existing deck_terms,
  inserts only new ones, returns count of inserted terms
- add updateValidatedLanguages — recalculates and persists validated_languages
  on every run so coverage stays accurate as translation data grows
- wire both functions into main with isNewDeck guard to avoid redundant
  validated_languages update on deck creation
- add final summary report
- fix possible undefined on result[0] in createDeck
- tick off remaining roadmap items

packages/db/src/db/schema.ts

@@ -144,11 +144,11 @@ export const decks = pgTable(
     ),
     check(
       "validated_languages_check",
-      sql`validated_for_languages <@ ARRAY[${sql.raw(SUPPORTED_LANGUAGE_CODES.map((l) => `'${l}'`).join(", "))}]::varchar[]`,
+      sql`validated_languages <@ ARRAY[${sql.raw(SUPPORTED_LANGUAGE_CODES.map((l) => `'${l}'`).join(", "))}]::varchar[]`,
     ),
     check(
       "validated_languages_excludes_source",
-      sql`NOT (${table.source_language} = ANY(validated_for_languages))`,
+      sql`NOT (${table.source_language} = ANY(${table.validated_languages}))`,
     ),
     unique("unique_deck_name").on(table.name, table.source_language),
   ],