Track durable greeting history for presence-aware greetings

OpenJibo/docs/release-1.0.19-plan.md

@@ -362,6 +362,7 @@ First completed slice in this personal-report parity track:
 1. MIM import foundation for personality expansion
 2. Dialog parsing expansion
 3. Presence-aware greetings and identity-triggered proactivity
+   - in progress: durable greeting-presence history and per-person cooldown gating are now in place
 4. Personal report parity slices
 5. Holidays and seasonal personality slice beyond pizza day
 6. Durable memory persistence path