Fix: #284 FetchInstanceInfoWorkerが原因でSidekiqのJobが詰まる問題 (#342)

* Fix: #284 `FetchInstanceInfoWorker`が原因でSidekiqのJobが詰まる問題

* Fix: InstanceInfoを取得するタイミング

* Fix test

* Fix test

* Fix: HTTPコード

* 調整

spec/workers/scheduler/update_instance_info_scheduler_spec.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe Scheduler::UpdateInstanceInfoScheduler do
-  let(:worker) { described_class.new }
-
-  before do
-    stub_request(:get, 'https://example.com/.well-known/nodeinfo').to_return(status: 200, body: '{}')
-    Fabricate(:account, domain: 'example.com')
-    Instance.refresh
-  end
-
-  describe 'perform' do
-    it 'runs without error' do
-      expect { worker.perform }.to_not raise_error
-    end
-  end
-end