fix: NR_EXT log lines

[keegoid-nr]

Don't print any NR_EXT lines when logsEnabled is false, including the startup line.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.56%. Comparing base (d0a6c2e) to head (59f5db6).
Report is 1 commits behind head on main.

Files	Patch %	Lines
util/logger.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #226      +/-   ##
==========================================
- Coverage   81.28%   80.56%   -0.73%     
==========================================
  Files          24       24              
  Lines        1234     1250      +16     
==========================================
+ Hits         1003     1007       +4     
- Misses        164      177      +13     
+ Partials       67       66       -1     

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