Fixed by mesh-controller PR 30 (79a9e17), rebased onto the merged
registry-reach train and proven by a green fresh run of the no-fake
two-node bed built from that commit.
Findings of an adversarial review of the 055 fix: hub!=broker conflated, membership tested
as has-address, silent staleness, portless silent fallback, two hubs unrefused. One review
claim recorded as disputed against live wire measurements.
https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx