Preserve modification time of rotated log files in FileRotator.

[terabytesoftw]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.12%. Comparing base (d9b2c1e) to head (cf22a24).

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #84      +/-   ##
============================================
+ Coverage     86.73%   87.12%   +0.39%     
- Complexity       36       38       +2     
============================================
  Files             2        2              
  Lines            98      101       +3     
============================================
+ Hits             85       88       +3     
  Misses           13       13              

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[Copilot]

Pull request overview

This PR fixes log rotation behavior so that rotated log files keep the original file’s modification timestamp, including when rotation uses gzip compression.

Changes:

• Update FileRotator::rotate() to capture the source file mtime and apply it to the rotated file via touch().
• Add a PHPUnit test ensuring rotated files preserve modification time for both compressed and uncompressed rotation.
• Document the bugfix in CHANGELOG.md.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/FileRotator.php	Captures source filemtime() and applies it to the rotated (and possibly compressed) destination file.
tests/FileRotatorTest.php	Adds regression test verifying mtime preservation for both compression modes.
CHANGELOG.md	Adds an entry describing the bugfix under the next release.

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