Add cloud column to licenses

This column will be used to distinguish cloud licenses from
legacy/offline licenses.

changelogs/unreleased/add-cloud-column-to-licenses.yml

+---
+title: 'Migration: Add cloud column to licenses'
+merge_request: 57781
+author:
+type: added

db/migrate/20210330015805_add_cloud_to_licenses.rb

+# frozen_string_literal: true
+
+class AddCloudToLicenses < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    add_column :licenses, :cloud, :boolean, default: false
+  end
+end

db/schema_migrations/20210330015805

+a435a211d7e8b9a972323769299fc6e537fdeaa127f8db6ab53031901a51ec36
\ No newline at end of file

db/structure.sql

@@ -14154,7 +14154,8 @@ CREATE TABLE licenses (
     id integer NOT NULL,
     data text NOT NULL,
     created_at timestamp without time zone,
-    updated_at timestamp without time zone
+    updated_at timestamp without time zone,
+    cloud boolean DEFAULT false
 );
 
 CREATE SEQUENCE licenses_id_seq