* fix(cli): commands exit without waiting on update checks or telemetry
The update and skills checks run in a detached child that refreshes the
caches for the next run; the parent only reads the caches. finalizeCli no
longer awaits the telemetry flush: the exit handler flushSync() delivers
what is queued. The events beacon, feedback and figma error paths stop
awaiting flush() too.
* fix(cli): retry a failed background check at most once an hour
Before starting the background worker, the CLI stamps a per-check attempt
time and skips a check it attempted within the hour, so a dead network no
longer starts a worker on every command. The stale-pin notice writes onto a
fresh read, detached spawns set windowsHide, and a test ties the worker path
to its build entry.
* fix(cli): a failed-check stamp dated in the future no longer silences update checks