uv venv on an existing .venv asks before replacing it and refuses outright
without a terminal, so updates through update-apps.sh failed and left the
services stopped (#17734). --clear replaces it the way the interactive prompt
did.
The noavx2 requirements pin numpy 1.23.5 and onnx 1.14.1, neither of which ships
a cp312 wheel, so on 3.12 uv built them from source: numpy fails without
distutils and onnx without cmake. Every noavx2 pin has a 3.11 wheel.