OpenCV 4.13.0 (numpy 2.4.0, headless, cp313)

Custom headless wheel built against numpy 2.4.0.

Artifacts:

• opencv_python_headless-4.13.0+961d7ee-cp313-cp313-linux_x86_64.whl

Notes:

• Linux x86_64, Python 3.13
• Headless build (no GUI dependencies)