feat(middle-msg): update lru msg

pkg/middle-msg/logx.go

@@ -3,7 +3,7 @@ package middle_msg
 import "time"
 
 var (
-	EventNameLog = "logcontext"
+	EventNameLog = "log-context"
 )
 
 type LogContext struct {

pkg/middle-msg/lru.go

@@ -1,3 +1,14 @@
 package middle_msg
 
+import "time"
 
+var LruCleanContextName = "lru-clean-context"
+
+type LruCleanContext struct {
+	Keys            []string
+	BeforeCleanSize int64
+	BehindCleanSize int64
+
+	StartTime time.Duration
+	EndTime   time.Duration
+}