add "network page" api (#460)

* add network api

* a minor change

* only show service name if unauthorized

* update

* 除了 load/初始化 避免在 singleton 进行查询等操作

---------

Co-authored-by: naiba <hi@nai.ba>

model/service_history_api.go

@@ -0,0 +1,10 @@
+package model
+
+type ServiceInfos struct {
+	ServiceID   uint64    `json:"monitor_id"`
+	ServerID    uint64    `json:"server_id"`
+	ServiceName string    `json:"monitor_name"`
+	ServerName  string    `json:"server_name"`
+	CreatedAt   []int64   `json:"created_at"`
+	AvgDelay    []float32 `json:"avg_delay"`
+}