* Run relevant PR checks and reserve packaging for merged releases
* Select embedded JavaScript tests and skip platform documentation builds
* Fetch only comparison commits for CI metadata checks
* Parallelize Windows PR validation and isolated timeout fixtures
* Reuse cached Cargo resolution and consolidate CLI test harnesses
* Overlap ARM PR lint and native linking with timing diagnostics
* Drop unproven cache preparation and measure ARM codegen parallelism
* Keep measured CI wins and remove duplicate frontend generation
