docs(m181): pre-swap probes generated from rubric tables, count-asserted

Greptile re-flag: an enumerated oracle list invites under-building.
probes.sh's pre-swap section is now derived from every R+S row of the
five merged rubrics with a completeness count assert — no hand-curated
subset.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>