@type t() :: %ExBifrost.Model.LogStats{
  average_latency: number(),
  cache_hit_rate_total_requests: integer() | nil,
  direct_cache_hits: integer() | nil,
  semantic_cache_hits: integer() | nil,
  success_rate: number(),
  total_cost: number(),
  total_requests: integer(),
  total_tokens: integer(),
  user_facing_success_rate: number(),
  user_facing_total_requests: integer()
}