更改：悬赏金额变更需要同步至链上以及关联疑修新增标记是否解决

db/migrate/20230309095515_add_fixed_to_pull_attached_issues.rb

@@ -0,0 +1,5 @@
+class AddFixedToPullAttachedIssues < ActiveRecord::Migration[5.2]
+  def change
+    add_column :pull_attached_issues, :fixed, :boolean, default: false
+  end
+end