Per defect report 1154.msg (agent-health-gateway-leg-flap-20260913):
1. Add _ssh_retry() helper with one retry at longer timeout (25s)
2. Name probe target explicitly: ssh {user}@{host} <command>
3. Print probe-failed when first attempt fails, then retry
4. Only declare gateway-down after retry fails
5. Make Koby report-only explicit in output
Changes:
- check_agents(): all gateway probes now use _ssh_retry()
- All output lines name the probe target (ssh host:port)
- Koby's report-only status is explicit in output
- Never print bare "gateway down" — always name target and failure kind
Verified: koonimo shows "probe-failed" on first attempt (transient SSH),
retries at 25s, succeeds, reports ✅ koonimo: gw=running
root
2f961d7e7a