test: re-enable GitHub Actions cache for integration tests#1124
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The gha cache was removed previously because it bought no time. With the LLB determinism fixes, cross-run hits are now realistic, so reinstate it to see if it shortens CI. Caches are per-test scoped and warmed on main; PRs read main + base + their own re-runs. Targets the v2 cache service only (v1 retired March 2025). Signed-off-by: Brian Goff <cpuguy83@gmail.com>
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Frontend uses a gha scope; workers reuse the ghcr registry caches published on merge and release, keeping heavy layers off the 10GB gha cap. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
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Previously removed because it saved no time. With recent LLB determinism fixes, cross-run cache hits should now be realistic, so re-enabling to measure CI impact.
Integration test solves
main, PRs read main + base + their own re-runs.url_v2+token,mode=max.Prebuilt base images
frontend/workerbakes now use gha cache. frontend = shared scope; worker = per-suite scope to avoid matrix collisions. buildx auto-detects the runtime token.Integration job exposes runtime tokens via crazy-max (commit-pinned). Draft to observe timing/cache-hit behavior before merging — first runs won't hit until
mainpopulates caches.