fix(minimax): track exhausted interval quota (status=2) instead of hiding it

MiniMax reports current_interval_status=2 when a percentage-based window is
fully consumed (0% remaining = 100% used). minimaxIntervalActive only accepted
status 1, so an exhausted interval was synthesized to zero and dropped - hiding
usage exactly when the user has hit their limit. Treat status 1 and 2 as active
(2 = exhausted); status 3 remains unsubscribed and is dropped.