adjust indexes

db/migrate/20250617075609_add_submissions_template_index.rb

@@ -3,5 +3,8 @@
 class AddSubmissionsTemplateIndex < ActiveRecord::Migration[8.0]
   def change
     add_index :submissions, %i[account_id template_id id], where: 'archived_at IS NULL'
+    add_index :submissions, %i[account_id template_id id],
+              where: 'archived_at IS NOT NULL',
+              name: 'index_submissions_on_account_id_and_template_id_and_id_archived'
   end
 end