Page scaling resets to the default setting

[Expurple]

Bug description

Page scaling settings reset to the default after opening and closing an xlsx file with umya_spreadsheet.

Expected behavior

Page scaling settings shouldn't change unless I explicitly edit them.

How to reproduce

1. Create an empty xlsx file.

2. In LibreOffice Calc, go to Format -> Page Style... -> Sheet -> Scale and put some limit on the printed width and height in pages:

   

   Excel has a similar setting too.

3. Save and close the file.

4. Open and close it using umya_spreadsheet, without editing anything.

5. In the "edited" file, the setting is reset back to its default value:

   

Here's a full reproducer repo that you can inspect and debug:

umya_layout_repro.zip

Version info

I'm using umya_spreadsheet 2.3.3 (the latest on crates.io) and LibreOffice Calc 25.8.2.2

[abend13]

Same bug for me with the latest MS Excel