One action in an automation, in position order.
:action_type is "publish", "delay", or "transform"; :action_config is the action's own options, passed through unchanged.
:action_type
"publish"
"delay"
"transform"
:action_config
@type t() :: %FoPost.AutomationStep{ action_config: term(), action_type: term(), id: term(), position: term(), raw: term() }