fix: mock

backend/app/workers/ocr_tasks.py

@@ -28,6 +28,9 @@ async def process_images_ocr_batch_async(image_ids: list[str], max_concurrency:
     """Process many images with bounded OCR concurrency."""
     if not image_ids:
         return
+    # De-duplicate in-memory to prevent repeated processing of same image id
+    # in a single batch submission.
+    image_ids = list(dict.fromkeys(image_ids))
     concurrency = max(1, max_concurrency)
     semaphore = asyncio.Semaphore(concurrency)