feat: add buffer location to error message

[joseph-sentry]

we want to make it easier to find the cause of a parsing error so i am adding the error location to the error message

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 15 lines in your changes missing coverage. Please review.

Project coverage is 85.34%. Comparing base (3348c31) to head (3d4a26d).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/junit.rs	25.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
- Coverage   87.50%   85.34%   -2.16%     
==========================================
  Files           5        5              
  Lines         568      587      +19     
==========================================
+ Hits          497      501       +4     
- Misses         71       86      +15     

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[codecov-notifications]

Codecov Report

Attention: Patch coverage is 25.00000% with 15 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/junit.rs	25.00%	15 Missing ⚠️

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