Function refreshCacheInBackground

apps/cli/src/update-checker.ts:201–211

* Fire-and-forget: fetch latest version from npm and update local cache. * Runs in background so CLI startup is never blocked by network IO.

(existingCache: UpdateCache | null)

 * Runs in background so CLI startup is never blocked by network IO.
 */
function refreshCacheInBackground(existingCache: UpdateCache | null): void {
  fetchLatestVersion()
    .then((latestVersion) => {
      writeCache({
        lastCheckTime: Date.now(),
        latestVersion,
        skippedVersion: existingCache?.skippedVersion,
      })
    })
    .catch(() => {})
}

/**
 * Start a periodic background cache refresh for long-running services.