优化：平均响应时间只统计近7天且排除>6h异常值

避免历史旧数据和长时间未处理告警拉高平均响应时间

app/services/alarm_event_service.py

@@ -522,8 +522,9 @@ class AlarmEventService:
                 AlarmEvent.handle_status.in_(["DONE", "IGNORED"])
             ).count()
 
-            # 平均响应时间（从 event_time 到 handled_at，只算已处理且时间合理的）
+            # 平均响应时间（只算近7天已处理的，排除>6h的异常值）
             from sqlalchemy.sql.expression import literal_column
+            stats_since = today_start - timedelta(days=7)
             avg_response = db.query(
                 func.avg(
                     func.timestampdiff(
@@ -535,6 +536,8 @@ class AlarmEventService:
             ).filter(
                 AlarmEvent.handled_at.isnot(None),
                 AlarmEvent.handled_at > AlarmEvent.event_time,
+                AlarmEvent.event_time >= stats_since,
+                func.timestampdiff(literal_column("MINUTE"), AlarmEvent.event_time, AlarmEvent.handled_at) <= 360,
             ).scalar()
 
             # 按 alarm_status 计数
@@ -676,9 +679,15 @@ class AlarmEventService:
             handled_count = db.query(AlarmEvent).filter(AlarmEvent.handle_status.in_(["DONE", "IGNORED"])).count()
 
             from sqlalchemy.sql.expression import literal_column
+            stats_since = today_start - timedelta(days=7)
             avg_response = db.query(
                 func.avg(func.timestampdiff(literal_column("MINUTE"), AlarmEvent.event_time, AlarmEvent.handled_at))
-            ).filter(AlarmEvent.handled_at.isnot(None), AlarmEvent.handled_at > AlarmEvent.event_time).scalar()
+            ).filter(
+                AlarmEvent.handled_at.isnot(None),
+                AlarmEvent.handled_at > AlarmEvent.event_time,
+                AlarmEvent.event_time >= stats_since,
+                func.timestampdiff(literal_column("MINUTE"), AlarmEvent.event_time, AlarmEvent.handled_at) <= 360,
+            ).scalar()
 
             by_type = {}
             for r in db.query(AlarmEvent.alarm_type, func.count(AlarmEvent.alarm_id)).group_by(AlarmEvent.alarm_type).all():