Build multi-platform Docker images (amd64 + arm64)#149
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The docker buildx build command had no --platform flag, so images were built only for the host architecture. This caused examples to fail on amd64 when the published image was arm64-only. - Add --platform linux/amd64,linux/arm64 to buildx commands in tox.ini - Add QEMU and Buildx setup steps to CI workflow - Simplify tox docker-push to push directly to Dockerhub - Update RELEASE.md to use tox -e docker-push - Switch base Docker image to python:3.14.1-slim and bump numpy version for 3.14 to avoid building numpy within amd64 container.
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The docker buildx build command had no
--platformflag, so images were built only for the host architecture. This caused examples to fail on amd64 when the published image was arm64-only.--platform linux/amd64,linux/arm64to buildx commands intox.initox -e docker-pushpython:3.14.1-slimand bump numpy versionfor 3.14 to avoid building numpy within amd64 container.