Goal: make durability demos less “trust me”. Click “Run double proof” → it produces N, docker kill -s KILL, restarts, consumes/commits, then proves “no loss + n

Goal: make durability demos less “trust me”. Click “Run double proof” → it produces N, docker kill -s KILL, restarts, consumes/commits, then proves “no loss + no dupes” while exposing the entire trail (proof JSON + docker inspect/events/log tail).