Move UpdateLastRequestTime method to timeout.go and add ShouldTimeout method for idle timeout handling

pkg/instance/lifecycle.go

@@ -140,15 +140,6 @@ func (i *Process) Stop() error {
 	return nil
 }
 
-// UpdateLastRequestTime updates the last request access time for the instance via proxy
-func (i *Process) UpdateLastRequestTime() {
-	i.mu.Lock()
-	defer i.mu.Unlock()
-
-	lastRequestTime := time.Now().Unix()
-	i.lastRequestTime.Store(lastRequestTime)
-}
-
 func (i *Process) monitorProcess() {
 	defer func() {
 		i.mu.Lock()