Record Linux/macOS CI evidence

[willamhou]

Summary

• Record PR Add Linux/macOS CLI readiness gates #14 / CI run #35 as hosted Linux/macOS shell/runtime smoke evidence.
• Update current status, execution spec, and README gap wording so macOS CI is no longer described as pending.
• Keep the remaining Linux/macOS CLI gaps scoped to online multi-file fixture evidence, next release-binary smoke evidence, Homebrew credentials, and docs polish.

Validation

• git diff --check

[github-actions]

DeepSeekCode review of PR #15 (Record Linux/macOS CI evidence)

Let me fetch the actual PR diff from GitHub since there's no local diff available.