新增：fork仓库不支持代码溯源

app/controllers/traces/projects_controller.rb

@@ -3,6 +3,7 @@ class Traces::ProjectsController < Traces::BaseController
 
   before_action :require_login
   before_action :load_project
+  before_action :require_project_not_be_forked_project
   before_action :set_trace_token_to_cookie
   before_action :authorizate_user_can_edit_project!, except: [:task_results]
 
@@ -95,4 +96,8 @@ class Traces::ProjectsController < Traces::BaseController
       :domain => Trace.trace_config[:cookie_domain]
     }
   end
+
+  def require_project_not_be_forked_project
+   return render_error('fork仓库暂不支持代码溯源服务，敬请谅解。') if @project.forked_from_project_id.present?
+  end
 end