@type t() :: %PhoenixAI.Response{
  content: String.t() | nil,
  finish_reason: String.t() | nil,
  model: String.t() | nil,
  parsed: map() | nil,
  provider: atom() | nil,
  provider_response: map(),
  tool_calls: [PhoenixAI.ToolCall.t()],
  usage: PhoenixAI.Usage.t()
}