Keep SceneContraction derivatives finite at the origin - #3796

buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c pip install --no-cache-dir --upgrade pip 'setuptools<70.0.0' && pip install --no-cache-dir torch==2.1.2+cu118 torchvision==0.16.2+cu118 'numpy<2.0.0' --extra-index-url https://download.pytorch.org/whl/cu118 && git clone --branch master --recursive https://github.com/cvg/Hierarchical-Localization.git /opt/hloc && cd /opt/hloc && git checkout v1.4 && python3.10 -m pip install --no-cache-dir . && cd ~ && TCNN_CUDA_ARCHITECTURES=\"${CUDA_ARCHITECTURES}\" pip install --no-cache-dir \"git+https://github.com/NVlabs/tiny-cuda-nn.git@b3473c81396fe927293bdfd5a6be32df8769927c#subdirectory=bindings/torch\" && pip install --no-cache-dir pycolmap==0.6.1 pyceres==2.1 omegaconf==2.3.0" did not complete successfully: exit code: 1

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671, docker/login-action@v3, docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/