@type t() :: %FerricStore.Flow.QueryIndexRetirement{
  completed_shards: non_neg_integer() | nil,
  current_phases: [binary()] | nil,
  deleted_bytes: non_neg_integer() | nil,
  deleted_entries: non_neg_integer() | nil,
  phase_counts: %{required(binary()) => non_neg_integer()} | nil,
  raw: map(),
  rewritten_reverse_rows: non_neg_integer() | nil,
  status: binary(),
  total_shards: pos_integer() | nil
}