add csv writeout to create_report_pages.py

def create_subpage(

    html_out,

    csv_out,

    csv_current: str,

    csv_previous: str,

    id_current: int,

    merged_reports = merge_and_cleanup_mld_reports(

        csv_current, csv_previous, id_current, id_previous

    )

    write_out_csv(merged_reports, merged_reports[0].keys(), csv_out)

    table_body = "\n".join(

        tr_from_row(row, id_current, id_previous) for row in merged_reports

    )

        f.write(new_subpage)

def write_out_csv(data, col_names, outfile):

    with open(outfile, "w") as f:

        writer = csv.DictWriter(f, col_names, delimiter=";")

        writer.writeheader()

        for row in data:

            writer.writerow(row)

def tr_from_row(row, id_current, id_previous):

    tr = list()

    for c in COLUMNS:

if __name__ == "__main__":

    parser = argparse.ArgumentParser()

    parser.add_argument("html_out")

    parser.add_argument("csv_out")

    parser.add_argument("csv_current")

    parser.add_argument("csv_previous")

    parser.add_argument("id_current", type=int)

    create_subpage(

        args.html_out,

        args.csv_out,

        args.csv_current,

        args.csv_previous,

        args.id_current,