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/drizzle/meta/_journal.json

@@ -5,15 +5,8 @@
     {
       "idx": 0,
       "version": "7",
-      "when": 1774721919883,
-      "tag": "0000_bitter_turbo",
-      "breakpoints": true
-    },
-    {
-      "idx": 1,
-      "version": "7",
-      "when": 1774970553186,
-      "tag": "0001_medical_fabian_cortez",
+      "when": 1775053965903,
+      "tag": "0000_faithful_oracle",
       "breakpoints": true
     }
   ]