polish code in rules

[123liuziming]

related to #150 and etc

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.88889% with 16 lines in your changes missing coverage. Please review.

Project coverage is 83.78%. Comparing base (378efdb) to head (a6c0ea3).

Files with missing lines	Patch %	Lines
pkg/inst-api/instrumenter/instrumenter.go	81.48%	7 Missing and 3 partials ⚠️
...api-semconv/instrumenter/db/db_client_extractor.go	81.81%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #171      +/-   ##
==========================================
+ Coverage   82.60%   83.78%   +1.17%     
==========================================
  Files          18       19       +1     
  Lines         713      771      +58     
==========================================
+ Hits          589      646      +57     
+ Misses        102      100       -2     
- Partials       22       25       +3     

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