@type t() :: %AshR2RML.Compilation{
  ash_source: String.t() | nil,
  ecto_migration: String.t() | nil,
  ir: AshR2RML.SemanticIR.t() | nil,
  mapping_bundle: AshR2RML.Mapping.Bundle.t() | nil,
  postgres_ddl: String.t() | nil,
  r2rml: String.t() | nil,
  receipt: AshR2RML.CompilationReceipt.t() | nil,
  refusals: list(),
  shacl: String.t() | nil,
  standing: atom(),
  status: atom()
}