--poll-interval 0 now really disables background STATUS polling (it was
clamped to 1s, and the equip branch force-enabled it anyway). Request
handlers and the poll thread now share _CARD_LOCK so a poll can never
interleave a FETCH/TERMINAL RESPONSE pair — the baseline log showed
AUTO-STATUS chains and duplicate FETCHes inside the equip TP chain.
--timing adds elapsed timestamps, per-reset logging (RESET #n) and
phase durations for startup (init_reader, card_init, pysim_app,
terminal_profile_drain) and equip (onecmd, terminal profile).
AGENTS.md documents the proactive-TR invariant: never fetch without
answering, never fetch twice, one APDU conversation at a time.
