nx_daemon_bench_test.nx

nx_daemon_bench_test.nx -- smoke: drive the daemon through every state transition and verify each one. We do NOT actually sleep -- this is a smoke, not a soak. We feed synthetic measurements that exercise: 1. IDLE -> WARMING during warmup_cycles 2. WARMING -> HEALTHY after warmup 3. HEALTHY -> DEGRADED when |z| crosses 3-sigma 4. DEGRADED -> REGRESSION when |z| crosses 5-sigma 5. OVERBUDGET path when we synthesise a budget violation 6. Cardinal compliance: REGRESSION without named_improvement = 0 7. Cardinal compliance: REGRESSION with named_improvement = 1 8. Sealed-enum validity predicate accepts 0..7, rejects 8 / -1 All eight assertions must pass. Any failure returns a unique non- zero exit code so debugging is one bisection.