fix(cobertura): handle malformed XML in Int() function

[sentry]

This PR addresses issue WORKER-YJ6, a ValueError occurring when parsing malformed Cobertura XML reports.

Problem:
The Int() helper function in apps/worker/services/report/languages/cobertura.py was not robust enough to handle severely malformed string inputs for coverage hits (e.g., '79<line number='). While it caught the initial ValueError from int(value), the fallback int(float(value)) would then raise an uncaught ValueError if the string was unparseable by float().

This malformed input originates from corrupted Cobertura XML where XML tag text appears to bleed into attribute values, indicating an issue with the upstream XML generation or parsing.

Solution:

1. Harden Int() function: The Int() function has been updated to catch both ValueError and TypeError for both int() and int(float()) conversion attempts. If conversion fails, it now returns None.
2. Graceful handling of None: Call sites for Int() within CoberturaProcessor (for both <line> and <statement> elements) now check if Int() returns None. If so, the specific line or statement is skipped, preventing further processing of invalid data and allowing the rest of the report to be processed without error.

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Fixes WORKER-YJ6

[thomasrockhu-codecov]

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Codecov Report

❌ Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
apps/worker/services/report/languages/cobertura.py	55.55%	4 Missing ⚠️

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[codecov]

Codecov Report

❌ Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.62%. Comparing base (a8ec2db) to head (fb8ce44).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
apps/worker/services/report/languages/cobertura.py	55.55%	4 Missing ⚠️

❌ Your patch check has failed because the patch coverage (55.55%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1987      +/-   ##
==========================================
- Coverage   91.63%   91.62%   -0.01%     
==========================================
  Files        1336     1336              
  Lines       53230    53237       +7     
  Branches     1647     1647              
==========================================
+ Hits        48778    48781       +3     
- Misses       4131     4135       +4     
  Partials      321      321              

Flag	Coverage Δ
workerintegration	58.47% <11.11%> (-0.02%)	⬇️
workerunit	90.53% <55.55%> (-0.03%)	⬇️

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