Bun's internal download of baseline compile targets from npm registry
consistently fails on Windows CI runners (ExtractionFailed error).
Pre-download the baseline binary via curl into Bun's cache directory
so the compile step finds it already cached and skips the download.
Also makes publish job resilient with if: always() so one failed
platform doesn't block publishing all other successful platforms.
YeonGyu-Kim
21c249e8c8