Improve integration test speed#140
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codebyemily wants to merge 4 commits intomainfrom
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Docker build caching in CI:
docker-compose.ci-cache.yml adds BuildKit cache settings to the two images Compose builds: server and mock-clark.
cache_to: type=gha saves build layers into GitHub’s Actions cache.
cache_from: type=gha tells the next build to reload those layers so unchanged steps (for example downloading Go modules or installing tooling) skip work.
Parallelize Tests:
Wired go test -count=1 -parallel 8 in the Makefile and added t.Parallel() to each integration test so the parallel limit actually applies and test result caching doesn’t hide failures.