10e07f5747
Empirical spike (demo arc, docs-only, no product code). Measures the two hub->box 'sync now' transports. Verdict: (b) long-poll = primary for user config (hub-only, reaches controller, no ep0/WG/agent coupling; binding ceiling = twin 60s nginx proxy_read_timeout + hub WriteTimeout, both config lifts); (a) ep0-relayed poke = agent-plane nudge (~0.42s, zero ep0/box infra change, EKEYREJECTED-confined). Viktor Q2 answered: hub.felhom.eu is DNS-only, no Cloudflare. All live mutations reverted; arc re-verified green.