personal memory agent

fix(observer): remove unbound operator warnings master

Unbound records are valid handle-authenticated observers, so operator surfaces should not treat a missing device binding as degraded or as a separate status. Capture health now derives freshness and ingest rejection state without adding an unbound degradation. Doctor and the observer CLI no longer read or count unbound state. A fresh unbound observer reports connected like any other active observer, while revoked and disconnected states keep their existing meanings.