@type t() :: %ApolloSignal.Types.ProjectMetricsSummaryResponse{
  bounce_rate: number(),
  bounced: integer(),
  click_rate: number(),
  clicked: integer(),
  complained: integer(),
  complaint_rate: number(),
  delivered: integer(),
  delivery_rate: number(),
  failed: integer(),
  open_rate: number(),
  opened: integer(),
  project_id: String.t(),
  read_engaged: integer(),
  read_engagement_rate: number(),
  sent: integer(),
  unsubscribed: integer(),
  window: ApolloSignal.Types.MetricsWindowResponse.t()
}