Fast, reliable Rust cross-platform builds

Cross-compile Rust on a development machine or CI runner that has suitable resources, then package the finished artifact for the target platform. Zig with cargo-zigbuild is a useful default for Linux GNU targets: it avoids running Rust's compiler under CPU emulation, while still allowing Buildx to assemble the target image. Preserve runtime behavior and prove the resulting binary works on the actual target ABI.

Inspect before changing the pipeline