fix: remove ValidatedString and TestrunOrSkipped

[joseph-sentry]

I previously added these because we were having issues storing very long test names and I wanted to "validate" the data that came in to make sure that we're not including random strings for test names that might include source code. The main problem was that we weren't able to index that data in timescale and that was causing issues. I've since removed those indexes and if we have to index on names we'll have to use full text indexes next time, but for now we don't need this anymore. In the future, we'll likely have to add some mechanism for users to "ignore" irrelevant tests in the UI, or filter the names of tests. In any case, the scope of this library is to simply parse a JUnit XML file, so we should stick to that here, and avoid trying to do more.

[codecov]

Codecov Report

❌ Patch coverage is 82.69231% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.67%. Comparing base (accbb7f) to head (3e176e8).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/junit.rs	75.34%	18 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
- Coverage   95.63%   94.67%   -0.97%     
==========================================
  Files          17       16       -1     
  Lines        2337     2027     -310     
==========================================
- Hits         2235     1919     -316     
- Misses        102      108       +6     

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

[codspeed-hq]

CodSpeed Performance Report

Merging #85 will not alter performance

_{Comparing joey/remove-structs (3e176e8) with main (accbb7f)}

Summary

✅ 6 untouched

[codecov-notifications]

Codecov Report

❌ Patch coverage is 82.69231% with 18 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/junit.rs	75.34%	18 Missing ⚠️

📢 Thoughts on this report? Let us know!