新增：获取代码溯源系统维护信息接口

app/services/trace/system_info_service.rb

@@ -0,0 +1,18 @@
+class Trace::SystemInfoService < Trace::ClientService 
+
+  attr_accessor :token
+
+  def initialize(token)
+    @token = token
+  end 
+
+  def call
+    result = authed_get(token, url)
+    response = render_response(result)
+  end
+
+  private 
+  def url 
+    '/user/systemInfo'.freeze
+  end
+end