Error messages nest at data.data.error.message; the warranty handlers read one
level too shallow so every failure showed a generic "failed". Read the correct
path (with fallbacks) so the actual reason shows - e.g. Dell's rate-limit
cooldown - and confirm the pulled coverage on a successful refresh.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>