Remove google-translate dep, upgrade firebase-admin, pin csv-parse, and improve processUsers.js

- Remove @iamtraction/google-translate (and undici vulnerability) — translation
  no longer needed, language files now copy English content directly
- Upgrade firebase-admin from ^12.0.0 to ^13.8.0
- Pin csv-parse to ~5.5.0 to avoid major version bump
- Use networkidle2 + 2s delay in processUsers.js for reliable screenshots

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/package.json

@@ -9,7 +9,7 @@
     "seed-views:force": "node seed-firebase-views.js --force"
   },
   "dependencies": {
-    "csv-parse": "^5.5.0",
-    "firebase-admin": "^12.0.0"
+    "csv-parse": "~5.5.0",
+    "firebase-admin": "^13.8.0"
   }
 }