[Szer]

Managed EAN-13 fallback spends extra CPU repeating rotation passes on difficult images. Set BarcodeReaderGeneric.AutoRotate=false; the EAN-13 reader retains its internal rotation fallback through TryHarder and RotateSupported. Native rotation, all crops, preprocessing, and worker limits stay unchanged.

Validation:

• All 40 OCR regression tests pass.
• Three paired ARM64 passes of the actual PR assembly preserve every output on all 2,201 original coupon photos: 2,181 correct, 1 wrong, 19 no-reads; no decoder warnings or OCR calls during the benchmark.
• Using per-image medians across the three passes, mean barcode-stage latency falls 26.78 → 21.75 ms (19%), p99 473.96 → 279.05 ms (41%), and mean CPU 29.22 → 22.61 ms (23%). The 52 difficult photos average 586 → 373 ms.

These measurements cover local barcode decoding on the original uploaded corpus, excluding Azure/network latency. Azure OCR call behavior is unchanged.