Outbound-only: no listener, no control surface — RedFlag's journal is
authoritative, Wazuh is a best-effort mirror. DGRAM to the local agent's
queue socket, ECS-formatted, rule IDs mapped from security event types.
Opt-in via REDFLAG_WAZUH_ENABLED=true; disabled = socket never opened.
- Sink interface on SecurityLogger (mirror after journal write)
- Write deadline + one reconnect, then drop-count with rate-limited log
- 3 tests: frame/ECS shape, absent-socket non-blocking, unknown→generic
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