chore: Add debug logging for MassTransit URI parsing exceptions

[tippmar-nr]

Summary

Add Log.Debug call in the MassTransitHelpers.GetQueueDataFromUri catch block to log exceptions that occur during URI parsing, following the same pattern used by other connection string parsers in the Extensions library (e.g., MsSqlConnectionStringParser, MySqlConnectionStringParser).

Changes

• MassTransit.cs: Log the caught exception via Log.Debug(ex, ...) instead of silently swallowing it.
• MassTransitHelperTests.cs: Add GetQueueData_ReturnsDefaults_WhenParsingThrows test that passes a relative URI to exercise the catch block and verify default values are returned.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.81%. Comparing base (597e65b) to head (5d4fd5b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3533      +/-   ##
==========================================
+ Coverage   81.79%   81.81%   +0.02%     
==========================================
  Files         508      508              
  Lines       34369    34370       +1     
  Branches     4067     4067              
==========================================
+ Hits        28112    28120       +8     
+ Misses       5288     5277      -11     
- Partials      969      973       +4     

Flag	Coverage Δ
Agent	82.80% <100.00%> (+0.02%)	⬆️
Profiler	71.75% <ø> (ø)

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Files with missing lines	Coverage Δ
...s/NewRelic.Agent.Extensions/Helpers/MassTransit.cs	88.63% <100.00%> (+2.37%)	⬆️

... and 4 files with indirect coverage changes

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