The desktop release only built on macos-latest (Apple Silicon, arm64),
so the darwin-x64 stable alias was never produced and Intel-Mac
ao start 404s fetching agent-orchestrator-darwin-x64.zip.
Add the macos-13 (Intel x64) runner to the job matrix and broaden the
macOS alias-upload step's condition from matrix.os == 'macos-latest' to
startsWith(matrix.os, 'macos') so it runs on both macOS runners. The
step already derives arch via uname -m, so the Intel runner now emits
and uploads the x64 alias. Updated the now-stale gap comment.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>