Pure decisions (shape presence, rung boundaries, Default: parse for wording
only), sweep probes for every AC path (malformed-once, conforming silence,
rungs despite activity, cron progression, missed-moment skip, re-flag
episode, unreadable comment list, malformed+rung same pass), and the
existing nudge fixtures updated to conforming escalations with pre-seeded
rung markers so each probe observes one behavior alone.
Part of #73.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>