entrypoint.sh creates /home/agent/vol/.openclaw-initializing at startup
and removes it just before launching the gateway. Pod is not marked
ready until init (volume copy + config baking) is fully complete.
deployment.yaml adds readinessProbe: exec test ! -f sentinel,
with initialDelaySeconds=5, periodSeconds=5, failureThreshold=60
(5 minute window for slow storage on first deploy).