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_schema.js

@@ -0,0 +1,12 @@
+const sqlite3 = require('better-sqlite3');
+const db = new sqlite3('./data/metadata.db');
+
+const tableInfo = db.prepare("PRAGMA table_info(model_configs)").all();
+console.log("Table info for model_configs:");
+console.log(JSON.stringify(tableInfo, null, 2));
+
+const sample = db.prepare("SELECT * FROM model_configs LIMIT 5").all();
+console.log("Sample data:");
+console.log(JSON.stringify(sample, null, 2));
+
+db.close();