Carries audit identity and correlation data through the current process.

A context can be captured in one process and attached in another. This is deliberately explicit: Elixir process dictionary state is not inherited by Tasks.

context = Chronicle.Context.capture()

Task.async(fn ->
  Chronicle.Context.with(context, fn ->
    Chronicle.record("email.delivered", %{message_id: id})
  end)
end)

If the context was captured inside an Chronicle.group/3, events from the task join that group. The group owner must await those tasks before returning.