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

query_db.js

@@ -0,0 +1,16 @@
+const Database = require('better-sqlite3');
+const db = new Database('d:/workspace/AuraK/data/metadata.db');
+
+try {
+    const session = db.prepare('SELECT id, messages FROM assessment_sessions WHERE messages IS NOT NULL AND messages != "[]" ORDER BY created_at DESC LIMIT 1').get();
+    if (session) {
+        console.log('ID:', session.id);
+        console.log('MESSAGES:', session.messages);
+    } else {
+        console.log('No sessions with messages found.');
+    }
+} catch (e) {
+    console.error(e);
+} finally {
+    db.close();
+}