ci: add GHA layer cache to push job#94
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May 26, 2026
Expands the `test` job to run in parallel for both `linux/amd64` and `linux/arm64` using a matrix strategy. QEMU and Buildx are added to support cross-architecture builds on the amd64 runner. - `fail-fast: false` ensures both platforms are always reported even if one fails - GHA cache is scoped per-platform (`scope=linux/amd64` / `scope=linux/arm64`) so each platform maintains its own cache entry - The `Test` step passes `--platform` to `docker run` to exercise the correct architecture via QEMU Note: if merged alongside #94, the push job's unscoped cache and the test job's scoped cache will coexist without conflict.
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Adds
cache-from: type=ghaandcache-to: type=gha,mode=maxto theBuild and pushstep. Thepushjob already hasdocker/setup-buildx-actionso no additional setup is required.On repeat pushes to
main, unchanged layers will be restored from the GHA cache instead of rebuilt from scratch, reducing build time significantly.Note: per-platform scoped caching for the
testjob is introduced separately alongside the arm64 matrix (PR #TODO).