Add description_drafting column to budgets table

spec/factories.rb

@@ -223,6 +223,7 @@ FactoryBot.define do
     sequence(:name) { |n| "Budget #{n}" }
     currency_symbol "€"
     phase 'accepting'
+    description_drafting  "This budget is drafting"
     description_accepting "This budget is accepting"
     description_reviewing "This budget is reviewing"
     description_selecting "This budget is selecting"