next.js

32d47cc5 - Add sccache via vercel/sccache fork with multi-level disk+Vercel Artifacts caching

Add sccache via vercel/sccache fork with multi-level disk+Vercel Artifacts caching Replace the WebDAV proxy and custom cached linker with native Vercel Artifacts backend from the vercel/sccache fork. Uses multi-level caching (local disk L0 + remote L1) and SCCACHE_RUST_CRATE_TYPE_ALLOW_HASH to cache all crate types including proc-macros and cdylibs.