@type t() :: %ExDaytona.Model.SystemMetrics{
  cpuCount: integer() | nil,
  cpuUsedPct: float() | nil,
  diskFree: integer() | nil,
  diskTotal: integer() | nil,
  diskUsed: integer() | nil,
  memCache: integer() | nil,
  memTotal: integer() | nil,
  memUsed: integer() | nil,
  timestamp: String.t() | nil,
  timestampUnix: integer() | nil
}