add index

db/migrate/20251121113910_add_send_sms_send_2fa_sms_index.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddSendSmsSend2faSmsIndex < ActiveRecord::Migration[8.0]
+  def change
+    add_index :submission_events, %i[account_id created_at],
+              where: "event_type IN ('send_sms', 'send_2fa_sms')",
+              name: 'index_submissions_events_on_sms_event_types'
+  end
+end