fix: OCR API error

backend/src/features/ocr/domain/ocr.service.ts

@@ -8,6 +8,7 @@ import type {
   OcrExtractRequest,
   OcrJobSubmitRequest,
   OcrResponse,
+  VinExtractionResponse,
 } from './ocr.types';
 
 /** Maximum file size for sync processing (10MB) */
@@ -92,6 +93,63 @@ export class OcrService {
     }
   }
 
+  /**
+   * Extract VIN from an image using VIN-specific OCR.
+   *
+   * @param userId - User ID for logging
+   * @param request - OCR extraction request
+   * @returns VIN extraction result
+   */
+  async extractVin(userId: string, request: OcrExtractRequest): Promise<VinExtractionResponse> {
+    if (request.fileBuffer.length > MAX_SYNC_SIZE) {
+      const err: any = new Error(
+        `File too large. Max: ${MAX_SYNC_SIZE / (1024 * 1024)}MB.`
+      );
+      err.statusCode = 413;
+      throw err;
+    }
+
+    if (!SUPPORTED_TYPES.has(request.contentType)) {
+      const err: any = new Error(
+        `Unsupported file type: ${request.contentType}. Supported: ${[...SUPPORTED_TYPES].join(', ')}`
+      );
+      err.statusCode = 415;
+      throw err;
+    }
+
+    logger.info('VIN extract requested', {
+      operation: 'ocr.service.extractVin',
+      userId,
+      contentType: request.contentType,
+      fileSize: request.fileBuffer.length,
+    });
+
+    try {
+      const result = await ocrClient.extractVin(
+        request.fileBuffer,
+        request.contentType
+      );
+
+      logger.info('VIN extract completed', {
+        operation: 'ocr.service.extractVin.success',
+        userId,
+        success: result.success,
+        vin: result.vin,
+        confidence: result.confidence,
+        processingTimeMs: result.processingTimeMs,
+      });
+
+      return result;
+    } catch (error) {
+      logger.error('VIN extract failed', {
+        operation: 'ocr.service.extractVin.error',
+        userId,
+        error: error instanceof Error ? error.message : 'Unknown error',
+      });
+      throw error;
+    }
+  }
+
   /**
    * Submit an async OCR job for large files.
    *