feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

server/scripts/check_models.js

@@ -0,0 +1,12 @@
+const Database = require('better-sqlite3');
+const fs = require('fs');
+const db = new Database('./data/metadata.db');
+
+try {
+    const rows = db.prepare("SELECT id, name, modelId, type, tenant_id FROM model_configs").all();
+    fs.writeFileSync('models_list.json', JSON.stringify(rows, null, 2));
+} catch (err) {
+    console.error(err);
+} finally {
+    db.close();
+}