code: def metadata_fixup(
      working_file: Path,
      context: PdfContext,
      pdf_save_settings: dict[str, Any],
  ) -> Path:
      """Fix certain metadata fields after Ghostscript PDF/A conversion.
  
      Also report on metadata in the input file that was not retained during
      PDF/A conversion.
      """
      output_file = context.get_path("metafix.pdf")
      options = context.options
  
      with Pdf.open(context.origin) as original, Pdf.open(
          working_file
      ) as pdf:
          docinfo = get_docinfo(original, context)
          with original.open_metadata(
              set_pikepdf_as_editor=False,
              update_docinfo=False,
              strict=False,
          ) as meta_original, pdf.open_metadata() as meta_pdf:
              meta_pdf.load_from_docinfo(
                  docinfo, delete_missing=False, raise_failure=False
              )
              _fix_metadata(meta_original, meta_pdf)
              _unset_empty_metadata(meta_original, options)
              _unset_empty_metadata(meta_pdf, options)
              meta_missing = set(meta_original.keys()) - set(
                  meta_pdf.keys()
              )
              report_on_metadata(options, meta_missing)
  
          _set_language(pdf, options.languages)
          pdf.save(output_file, **pdf_save_settings)
  
      return output_file
  
imports: from __future__ import annotations
  import logging
  import os
  from datetime import datetime, timezone
  from pathlib import Path
  from typing import Any
  from pikepdf import Dictionary, Name, Pdf
  from pikepdf import __version__
  from pikepdf.models.metadata import PdfMetadata, encode_pdf_date
  from ocrmypdf._jobcontext import PdfContext
  from ocrmypdf._version import PROGRAM_NAME
  from ocrmypdf._version import __version__
  from ocrmypdf.languages import iso_639_2_from_3
label_desc: Use image node_id 8 for calling a global function with example usage: metadata_fixup(working_file, context, pdf_save_settings) and returns: output_file