docs: def filter_data_values(data):
      """Remove special values that log function can take
  
      There are some special values, like "request" that the `log()`
      function can take, but they're not meant to be passed to the celery
      task neither for the event handlers. This function filter these keys
      and return another dict without them.
      """
      banned = ('request',)
      return {key: val for key, val in data.items() if not key in banned}