[#177614355] Create admin-facing audit log for "login as user" feature

Author: kceb

lib/jsonapi/utils/response/formatters.rb

@@ -263,6 +263,7 @@ def get_source_relationship(options)
         # @api private
         def result_options(records, options)
           {}.tap do |data|
+            data[:meta] = data.fetch(:meta, {}).merge(options.fetch(:meta, {}))
             if JSONAPI.configuration.default_paginator != :none &&
               JSONAPI.configuration.top_level_links_include_pagination
               data[:pagination_params] = pagination_params(records, options)