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/ocr/ocr.controller.ts

@@ -0,0 +1,35 @@
+import {
+  Controller,
+  Post,
+  UseGuards,
+  UseInterceptors,
+  UploadedFile,
+} from '@nestjs/common';
+import { FileInterceptor } from '@nestjs/platform-express';
+import { CombinedAuthGuard } from '../auth/combined-auth.guard';
+import { OcrService } from './ocr.service';
+import { I18nService } from '../i18n/i18n.service';
+
+@Controller('ocr')
+@UseGuards(CombinedAuthGuard)
+@UseGuards(CombinedAuthGuard)
+export class OcrController {
+  constructor(
+    private readonly ocrService: OcrService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  @Post('recognize')
+  @UseInterceptors(FileInterceptor('image'))
+  async recognizeText(@UploadedFile() image: Express.Multer.File) {
+    console.log('OCR recognition endpoint called');
+    if (!image) {
+      console.error('No image uploaded');
+      throw new Error(this.i18n.getMessage('noImageUploaded'));
+    }
+    console.log(`Received image. Size: ${image.size} bytes`);
+    const text = await this.ocrService.extractTextFromImage(image.buffer);
+    console.log(`OCR extraction completed. Text length: ${text.length}`);
+    return { text };
+  }
+}