@type t() :: %E2bEx.SandboxMetric{
  cpu_count: integer() | nil,
  cpu_used_pct: float() | nil,
  disk_total: integer() | nil,
  disk_used: integer() | nil,
  mem_cache: integer() | nil,
  mem_total: integer() | nil,
  mem_used: integer() | nil,
  timestamp: String.t() | nil,
  timestamp_unix: integer() | nil
}