Consider parallel downloads for mpak update (no args)

[mgoldsborough]

Context

From QA review of issue-37-cli-add-bundle-update-awareness branch.

Problem

In packages/cli/src/commands/packages/update.ts, outdated bundles are updated sequentially in a for...of loop. Since each download is independent, Promise.allSettled would be faster for users with multiple outdated bundles.

The current sequential approach is correct and handles partial failure gracefully. This is a performance improvement, not a bug.

Suggested Fix

const results = await Promise.allSettled(
  outdated.map(async (entry) => {
    const downloadInfo = await resolveBundle(entry.name, client);
    const { version } = await downloadAndExtract(entry.name, downloadInfo);
    return { name: entry.name, from: entry.current, to: version };
  })
);

Severity

Suggestion — non-blocking.