@type t() :: %Durable.Storage.Schemas.ActivityEvent{
  __meta__: term(),
  at: DateTime.t(),
  count: pos_integer(),
  details: map(),
  id: Ecto.UUID.t(),
  kind: String.t(),
  node_id: String.t() | nil,
  queue: String.t() | nil,
  workflow_id: Ecto.UUID.t() | nil
}