db: apply good_jobs migrations

Apply a couple of migrations from `bin/rails generate good_job:update`.

db/migrate/20221026084655_create_good_job_settings.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+class CreateGoodJobSettings < ActiveRecord::Migration[7.0]
+  def change
+    reversible do |dir|
+      dir.up do
+        # Ensure this incremental update migration is idempotent
+        # with monolithic install migration.
+        return if connection.table_exists?(:good_job_settings)
+      end
+    end
+
+    create_table :good_job_settings, id: :uuid do |t|
+      t.timestamps
+      t.text :key
+      t.jsonb :value
+      t.index :key, unique: true
+    end
+  end
+end