Update _get_folder_size: Reduce Logs noise and switch to os.scandir

[bhimrazy]

What does this PR do?

Improves _get_folder_size by:

• Switching to os.scandir for better performance.
• Including temporary .bin files in size calc without logging.
• Reducing log noise by skipping temp file warnings.

Fixes #492.

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[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 79%. Comparing base (43937d4) to head (130058c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #499   +/-   ##
===================================
  Coverage    79%    79%           
===================================
  Files        38     38           
  Lines      5646   5654    +8     
===================================
+ Hits       4470   4477    +7     
- Misses     1176   1177    +1     

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