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/note/note-category.controller.ts

@@ -0,0 +1,57 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Put,
+  Delete,
+  Body,
+  Param,
+  UseGuards,
+  Request,
+} from '@nestjs/common';
+import { NoteCategoryService } from './note-category.service';
+import { CombinedAuthGuard } from '../auth/combined-auth.guard';
+
+@Controller('v1/note-categories')
+@UseGuards(CombinedAuthGuard)
+export class NoteCategoryController {
+  constructor(private readonly categoryService: NoteCategoryService) {}
+
+  @Get()
+  async findAll(@Request() req: any) {
+    return this.categoryService.findAll(req.user.id);
+  }
+
+  @Post()
+  async create(
+    @Request() req: any,
+    @Body('name') name: string,
+    @Body('parentId') parentId?: string,
+  ) {
+    return this.categoryService.create(
+      req.user.id,
+      name,
+      parentId,
+    );
+  }
+
+  @Put(':id')
+  async update(
+    @Request() req: any,
+    @Param('id') id: string,
+    @Body('name') name?: string,
+    @Body('parentId') parentId?: string,
+  ) {
+    return this.categoryService.update(
+      req.user.id,
+      id,
+      name,
+      parentId,
+    );
+  }
+
+  @Delete(':id')
+  async remove(@Request() req: any, @Param('id') id: string) {
+    return this.categoryService.remove(req.user.id, id);
+  }
+}