fix(fam-edge): validate_schema 透传 person_appearances - events 清洗白名单原只留 timestamp/description/people/is_attention，丢弃了特征字段导致特征链路断

fam-edge/src/fam_edge/ai_orchestrator/json_parser.py

@@ -89,6 +89,8 @@ def validate_schema(data: dict) -> dict:
             "timestamp": str(ev["timestamp"]),
             "description": str(ev["description"]),
             "people": [str(p) for p in people if p],
+            # 人物结构化特征（uid/features/action）——保留透传，供人物合并/特征卡
+            "person_appearances": ev.get("person_appearances"),
             "is_attention_event": bool(ev.get("is_attention_event", False)),
         })
     data["events"] = cleaned