chore: typo fixes

[anim001k]

Summary

Fixes three spelling errors in code comments within transaction-metrics-tracker/src/lib.rs.

Changes

• Line 14: signaure → signature
• Line 23: rudimentry → rudimentary
• Line 33: rudimentry → rudimentary

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.8%. Comparing base (fb1d632) to head (69bb347).
⚠️ Report is 2667 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #7303     +/-   ##
=========================================
- Coverage    82.8%    82.8%   -0.1%     
=========================================
  Files         801      801             
  Lines      363429   363429             
=========================================
- Hits       300993   300976     -17     
- Misses      62436    62453     +17     

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[steviez]

thanks