apply highlighting and showing supplier name to invoice pdf

spec/factories/sepa_account_holder.rb

@@ -0,0 +1,12 @@
+require 'factory_bot'
+
+FactoryBot.define do
+  factory :sepa_account_holder do
+    user { create :user }
+    group { create :ordergroup }
+    iban { "DE89370400440532013000" }
+    bic { "DEUTDEFF" }
+    mandate_id { "TEST-MANDATE-001" }
+    mandate_date_of_signature { Time.current }
+  end
+end