some kind of fatal on parsing - detentionstats columns changed

[HongPong]

So this is on the current head. I merged in #66 already. The headers changed in the detentionstats.xlsx file. Fy25 was replaced with fy26. Also the column "Pending FY25 Inspection" disappeared. I suspect "Pending FY26 Inspection" could appear later so we might want to change it so that it can deal with it. Anyways I made quick fixes and a couple comments to get it working again for now...

 uv run python main.py --scrape --debug 
ICE Detention Facilities Scraper by the Open Security Mapping Project. MIT License.
Collecting initial facility data from https://www.ice.gov/detain/detention-management
Found sheet at: https://www.ice.gov/doclib/detention/FY26_detentionStats11202025.xlsx
Downloading detention stats sheet from https://www.ice.gov/doclib/detention/FY26_detentionStats11202025.xlsx
Wrote 220106 byte sheet to ice_detention_scraper/ice_scrapers/detentionstats.xlsx
Traceback (most recent call last):
  File "ice_detention_scraper/main.py", line 173, in <module>
    main()
    ~~~~^^
  File "ice_detention_scraper/main.py", line 134, in main
    facilities_data = facilities_scrape_wrapper(
        keep_sheet=not args.delete_sheets,
        force_download=not args.skip_downloads,
        skip_vera=not args.use_vera,
    )
  File "ice_detention_scraper/ice_scrapers/general.py", line 15, in facilities_scrape_wrapper
    facilities = load_sheet(keep_sheet, force_download)
  File "ice_detention_scraper/ice_scrapers/spreadsheet_load.py", line 109, in load_sheet
    df, sheet_url = _download_sheet(keep_sheet, force_download)
                    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "ice_detention_scraper/ice_scrapers/spreadsheet_load.py", line 93, in _download_sheet
    df = polars.read_excel(
        drop_empty_rows=True,
    ...<5 lines>...
        source=open(filename, "rb"),
    )
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/polars/_utils/deprecation.py", line 128, in wrapper
    return function(*args, **kwargs)
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/polars/_utils/deprecation.py", line 128, in wrapper
    return function(*args, **kwargs)
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/polars/io/spreadsheet/functions.py", line 403, in read_excel
    _read_spreadsheet(
    ~~~~~~~~~~~~~~~~~^
        src,
        ^^^^
    ...<13 lines>...
        drop_empty_cols=drop_empty_cols,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/polars/io/spreadsheet/functions.py", line 687, in _read_spreadsheet
    name: reader_fn(
          ~~~~~~~~~^
        parser=parser,
        ^^^^^^^^^^^^^^
    ...<7 lines>...
        drop_empty_cols=drop_empty_cols,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/polars/io/spreadsheet/functions.py", line 1093, in _read_spreadsheet_calamine
    ws_arrow = parser.load_sheet_eager(sheet_name, **read_options)
  File "ice_detention_scraper/.venv/lib/python3.13/site-packages/fastexcel/__init__.py", line 576, in load_sheet_eager
    return self._reader.load_sheet(
           ~~~~~~~~~~~~~~~~~~~~~~~^
        idx_or_name=idx_or_name,
        ^^^^^^^^^^^^^^^^^^^^^^^^
    ...<8 lines>...
        eager=True,
        ^^^^^^^^^^^
    )
    ^
_fastexcel.CannotRetrieveCellDataError: cannot retrieve cell data at (7, 27)
Context:
    0: could not determine dtype for column Last Final Rating

[HongPong]

closing this for now but more robust solution for changing fiscal years and "pending FYXX Inspection" columns would be more future proofed