post_update_to_api can take up to 33 seconds worst-case (3 curl attempts
x 10s timeout + sleep delays). Without any terminal output during this
time, users think the script is stuck and press Ctrl+Z, which prevents
the recovery menu from ever appearing.
Add msg_info spinner before both post_update_to_api calls in the failure
path (initial report + final force retry after recovery menu).
2cdeb07353