Fix: Exclude platform-specific code from coverage, fixes #9351

[trxvorr]

Description

This PR addresses missing coverage reports for platform-specific code (e.g., # pragma: win32 only) by explicitly excluding these pragmas in pyproject.toml. Fixes #9351.

Previously, pyproject.toml only excluded pragma: freebsd only and pragma: unknown platform only. This caused Codecov to report missing coverage for valid platform-specific imports (like set_birthtime on Windows) when running on Linux CI.

Changes

• pyproject.toml: Added win32, posix, linux, darwin, and netbsd pragmas to the exclude_lines list in coverage configuration.

Verification

• Verify that Codecov no longer reports missing coverage for lines marked with these pragmas.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.20%. Comparing base (3349cdc) to head (2c25719).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9352      +/-   ##
==========================================
+ Coverage   76.03%   76.20%   +0.17%     
==========================================
  Files          85       85              
  Lines       14744    14699      -45     
  Branches     2194     2191       -3     
==========================================
- Hits        11211    11202       -9     
+ Misses       2856     2820      -36     
  Partials      677      677              

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[ThomasWaldmann]

Is that the only way to deal with it, by completely excluding these lines everywhere?

Actually we have coverage for platform-specific lines, but only on the runner with the respective platform.