@type t() :: %Rag.Generation{
  context: String.t(),
  context_sources: [String.t()],
  evaluations: %{required(atom()) => any()},
  prompt: String.t(),
  query: String.t(),
  query_embedding: [number()],
  response: String.t(),
  retrieval_results: %{required(atom()) => any()}
}