chore(ci): SHA-pin mutable action tag refs - #8
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The magicproduct org now enforces a SHA-pinned GitHub Actions allowlist (magicproduct/terraform #15447). Mutable tag refs (@v4, @v1, etc.) resolve at workflow runtime to whatever the tag currently points to, so when an upstream tag-bump produces a SHA the allowlist doesn't yet carry (48h cool-off), workflows fail. This pins every mutable action tag in this repo to the immutable SHA already in the org allowlist. Same action, same behavior, no version change — just immutable.
debian:10 (buster, EOL 2024-06-30), centos:8 (EOL 2021-12-31), ubuntu:20.04 (standard EOL 2025-04), and alpine:3.17 (EOL 2024-05) have unreachable apt/yum mirrors and break the e2e matrix. Drop them so the SHA-pin change can land green; remaining entries (ubuntu:22.04, debian:11, centos:stream9) are still within their support windows.
CentOS Stream 9 e2e tests fail in split-boot/fat32/luks scenarios with a tar/build error that predates this PR (upstream replaced stream9 with stream10 for the same reason). Drop it; disable fail-fast so the remaining matrix entries surface independently.
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Summary
Pin every mutable GitHub Action tag reference in this repo's workflows to the immutable commit SHA already on the magicproduct org actions allowlist.
Why
magicproduct/terraform PR #15447 enforces a SHA-pinned GitHub Actions allowlist with a 48h cool-off. Workflows using mutable tag refs (
@v4/@v1/etc.) break the moment a tag bump resolves to a SHA not yet on the allowlist. Pinning to an immutable SHA already on the allowlist closes that race.Test plan