@type t() :: %AshR2RML.OBDA.Observation{
  command_sha256: String.t() | nil,
  evidence_kind: :system_process | :injected_runner,
  exit_status: integer() | nil,
  mapping_sha256: String.t() | nil,
  query_sha256: String.t() | nil,
  raw_output: String.t() | nil,
  refusal: AshR2RML.Refusal.t() | nil,
  rows: [map()],
  standing: atom(),
  status: atom(),
  system: atom() | String.t()
}