Transfer the build job Turbo cache to the four native package runners within the same workflow. Keep the normal build, prepack, pack, fresh installation, updater, and Inspector verification commands. Native artifacts and dependencies remain host-local.
Validation: actionlint 1.7.7, check:ci and docs:check passed. A fresh independent checkout restored 1124 byte-identical files from 1.64 MB of compile/skills cache in 163 ms; a source change invalidated compile and skills entries. Full package and real Node Inspector verifiers passed on macOS arm64. Cross-platform CI timing remains to be measured.
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