fix tls metrics

[suchen-sci]

fix #496 which was introduced by https://github.com/megaease/easeprobe/pull/386/files#diff-f4ba94b6ceb9d73b8797e5ca558f756010112d0d6b71ca4ffcdf3da10fbe2c1f

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.93%. Comparing base (eef3a25) to head (cab0d17).
Report is 26 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #520      +/-   ##
==========================================
+ Coverage   98.80%   98.93%   +0.12%     
==========================================
  Files          85       82       -3     
  Lines        5867     4782    -1085     
==========================================
- Hits         5797     4731    -1066     
+ Misses         51       34      -17     
+ Partials       19       17       -2     

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