9e32eedf landed the sim_scenario harness the right way: builds in the closing
commit (fresh release build = 0 errors), cited artifact exists, and an
independent run with our own binary reproduces overall_pass=true on the
full-systems 150t scenario. No closure outran proof. One cosmetic --seeds N
doc/UX nit noted (non-blocking). No objective status change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>