service stage_file_proxy.subscriber in Stage File Proxy 8

class: Drupal\stage_file_proxy\EventSubscriber\ProxySubscriber
tags:
  - { name: event_subscriber }
arguments:
  - '@stage_file_proxy.fetch_manager'
  - '@logger.channel.stage_file_proxy'
  - '@event_dispatcher'
  - '@config.factory'
  - '@request_stack'