add index on email email event

db/migrate/20240720063826_add_index_on_email_email_events.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddIndexOnEmailEmailEvents < ActiveRecord::Migration[7.1]
+  def change
+    add_index :email_events, :email
+  end
+end