Spec Kitty

Mission Run: CLI SaaS fan-out preserves local at

Thread StatusEvent.at through SaaS fan-out so the canonical wire timestamp matches the local lane-transition time, not the sync-emission clock.

After mission #188 the SaaS side persists Event.occurred_at from the wire envelope's timestamp. But the CLI's _saas_fan_out() and emit_wp_status_changed() mint a fresh timestamp at sync-emission time instead of threading the local StatusEvent.at value, so even non-historical events look like 'just now'. This mission threads the local at through the fan-out and makes sync emitter accept an explicit occurrence timestamp; fresh timestamps are minted ONLY for events created at emission time.