Add notification_level to namespace_root_storage_statistics table

Changelog: added

db/migrate/20220317170122_add_notification_level_to_namespace_root_storage_statistics.rb

+# frozen_string_literal: true
+
+class AddNotificationLevelToNamespaceRootStorageStatistics < Gitlab::Database::Migration[1.0]
+  enable_lock_retries!
+
+  def up
+    add_column :namespace_root_storage_statistics, :notification_level, :integer, limit: 2, default: 100, null: false
+  end
+
+  def down
+    remove_column :namespace_root_storage_statistics, :notification_level
+  end
+end

db/schema_migrations/20220317170122

+0bd78ce207cca13b5c4557ace87c135972ed69cd05ee8c6fcc60a9c060ba8b5f
\ No newline at end of file

db/structure.sql

@@ -17331,7 +17331,8 @@ CREATE TABLE namespace_root_storage_statistics (
     snippets_size bigint DEFAULT 0 NOT NULL,
     pipeline_artifacts_size bigint DEFAULT 0 NOT NULL,
     uploads_size bigint DEFAULT 0 NOT NULL,
-    dependency_proxy_size bigint DEFAULT 0 NOT NULL
+    dependency_proxy_size bigint DEFAULT 0 NOT NULL,
+    notification_level smallint DEFAULT 100 NOT NULL
 );
 
 CREATE TABLE namespace_settings (