fixed 解决安全问题访问附件，id改为uuid，关联功能修改

db/migrate/20231212012107_change_identity_verification.rb

@@ -0,0 +1,8 @@
+class ChangeIdentityVerification < ActiveRecord::Migration[5.2]
+  def change
+    change_column :identity_verifications, :card_front, :string
+    change_column :identity_verifications, :card_back, :string
+    change_column :identity_verifications, :hold_card_front, :string
+    change_column :identity_verifications, :hold_card_back, :string
+  end
+end