Batch enrich

Upload a CSV file with header title,brand,barcode (extra columns ignored, each row needs title or barcode). Download sample CSV. The file is validated in the browser before upload — header, row cap, and every row — and the server re-checks the same rules. Jobs run sequentially, one item at a time with a 5s pause between items so scraping stays polite. You can leave this page open; progress polls GET /api/batch?id=.