add index

app/models/account.rb

@@ -15,7 +15,8 @@
 #
 # Indexes
 #
-#  index_accounts_on_uuid  (uuid) UNIQUE
+#  index_accounts_on_created_at  (created_at)
+#  index_accounts_on_uuid        (uuid) UNIQUE
 #
 class Account < ApplicationRecord
   attribute :uuid, :string, default: -> { SecureRandom.uuid }

db/migrate/20261101120000_add_accounts_created_at_index.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddAccountsCreatedAtIndex < ActiveRecord::Migration[8.1]
+  def change
+    add_index :accounts, :created_at, if_not_exists: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_10_25_120002) do
+ActiveRecord::Schema[8.1].define(version: 2026_11_01_120000) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "btree_gin"
   enable_extension "pg_catalog.plpgsql"
@@ -62,6 +62,7 @@ ActiveRecord::Schema[8.1].define(version: 2026_10_25_120002) do
     t.string "timezone", null: false
     t.datetime "updated_at", null: false
     t.string "uuid", null: false
+    t.index ["created_at"], name: "index_accounts_on_created_at"
     t.index ["uuid"], name: "index_accounts_on_uuid", unique: true
   end