Vouch request: loveRhythm1990

[loveRhythm1990]

What do you want to work on?

I want to work on issue #2112.

On macOS, mise run gateway fails while host-staging the musl supervisor binary with ProcessFdQuotaExceeded. The docker/podman path runs cargo zigbuild on the host without raising ulimit -n, while the VM path already has an fd-limit guard.

My plan is to extract that existing guard into a shared helper (for example tasks/scripts/build-env.sh), call it from stage-prebuilt-binaries.sh before the host zigbuild, and reuse it from the VM script so we do not keep two copies. I will also fix the stale comment in gateway-docker.sh that says the cross-compile happens inside Linux containers.

Why this change?

This blocks the common local docker/podman gateway path for macOS contributors who still have the default ulimit -n 256.

The fix looks small and mostly reuses a pattern that already works on the VM path, so it feels like a good first contribution.

Checklist

• I wrote this request myself (not AI-generated)
• I have read CONTRIBUTING.md