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/src/auth/jwt-auth.guard.ts

@@ -0,0 +1,45 @@
+import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import { AuthGuard } from '@nestjs/passport';
+import { lastValueFrom, Observable } from 'rxjs';
+import { IS_PUBLIC_KEY } from './public.decorator';
+import { tenantStore } from '../tenant/tenant.store';
+
+@Injectable()
+export class JwtAuthGuard extends AuthGuard('jwt') implements CanActivate {
+  constructor(private reflector: Reflector) {
+    super();
+  }
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
+      context.getHandler(),
+      context.getClass(),
+    ]);
+    if (isPublic) {
+      return true;
+    }
+
+    const result = await super.canActivate(context);
+    let canActivate = false;
+
+    if (result instanceof Observable) {
+      canActivate = await lastValueFrom(result);
+    } else {
+      canActivate = result;
+    }
+
+    if (canActivate) {
+      const request = context.switchToHttp().getRequest();
+      const user = request.user;
+      if (user) {
+        const store = tenantStore.getStore();
+        if (store) {
+          store.tenantId = user.tenantId;
+          store.userId = user.id;
+        }
+      }
+    }
+    return canActivate;
+  }
+}