Fix attrs being silently dropped on child loggers

[FollowTheProcess]

Summary

Fix a bug where l.attrs were not copied to a child logger so would be silently dropped

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.33%. Comparing base (4c4fc3a) to head (070da80).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
log.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
+ Coverage   96.29%   96.33%   +0.03%     
==========================================
  Files           3        3              
  Lines         108      109       +1     
==========================================
+ Hits          104      105       +1     
  Misses          3        3              
  Partials        1        1              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.