HealthMonitor — tracks per-endpoint freshness and reliability so the pool can
route to healthy, up-to-date nodes and avoid the "lagging node drops your tx"
failure mode. Freshness is judged by comparing observed slots across
endpoints; an endpoint more than maxSlotLag behind the best is unhealthy.
HealthMonitor — tracks per-endpoint freshness and reliability so the pool can route to healthy, up-to-date nodes and avoid the "lagging node drops your tx" failure mode. Freshness is judged by comparing observed slots across endpoints; an endpoint more than
maxSlotLagbehind the best is unhealthy.