Close audit findings: anti-spoof client IP for login rate limit, JWT/CORS
enforce on startup, SSH host-key verification and sudo via stdin, optional
WinRM HTTPS, SSE httpOnly cookie auth, ingest body limit, ILIKE escaping,
and HMAC API key hashing with legacy SHA-256 fallback.
Silent SSH probe on host card open; manual test feedback auto-hides. Persist ssh_admin_ok in DB (migration 019). After agent update read version from host and refresh UI.