enhance: Add trace for bf cost in l0 compactor

[weiliu1031]

No description provided.

[mergify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.89%. Comparing base (5fac2fa) to head (e076a7c).
Report is 10 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #33860      +/-   ##
==========================================
- Coverage   80.89%   80.89%   -0.01%     
==========================================
  Files        1063     1064       +1     
  Lines      136139   136247     +108     
==========================================
+ Hits       110136   110218      +82     
- Misses      21817    21829      +12     
- Partials     4186     4200      +14     

Files	Coverage Δ
internal/datanode/compaction/l0_compactor.go	92.43% <100.00%> (+0.12%)	⬆️

... and 27 files with indirect coverage changes

[weiliu1031]

rerun ut

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[weiliu1031]

retun ut

[XuanYang-cn]

/lgtm

[congqixia]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, weiliu1031

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