nx_consul_health.nx

nx_consul_health.nx -- sovereign LIVE HEALTH CHECKS (HashiCorp Consul health-check-class; CONSUL-004). Drives each instance's health (PASSING/CRITICAL in the CONSUL-001 registry) from a probe result -- in production probe_ok = (nx_reach_probe(addr,port) == 0), real TCP reachability. FLAP PROTECTION: a single failure does NOT flip a healthy node; it takes fail_thr CONSECUTIVE failures to go CRITICAL, and pass_thr CONSECUTIVE successes to recover to PASSING -- so transient blips don't yank a node out of discovery/DNS. The updated health array feeds cs_discover / csd_resolve directly = the loop is closed. Composes nx_consul_registry. license_tier: ORIGINAL