<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ClientInit():
 """Run all startup routines for the client."""

  metric_metadata = client_metrics.GetMetadata()
  metric_metadata.extend(communicator.GetMetricMetadata())
  stats_collector_instance.Set(
      default_stats_collector.DefaultStatsCollector(metric_metadata))

  config_lib.SetPlatformArchContext()
  config_lib.ParseConfigCommandLine()

  client_logging.LogInit()
  all_parsers.Register()
  registry.Init()

  if not config.CONFIG.ContextApplied(contexts.CLIENT_BUILD_CONTEXT):
    config.CONFIG.Persist("Client.labels")
    config.CONFIG.Persist("Client.proxy_servers")
    config.CONFIG.Persist("Client.tempdir_roots")