🤖 Add tests for TokenlessAzureHandler timestamp handling

[sentry-autofix]

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This fix was triggered by Trent Schmidt

Fixes API-5YR

This change introduces a new test suite for the TokenlessAzureHandler's ability to correctly handle timestamps from the Azure DevOps API, focusing on nanosecond and microsecond precision. Three tests were added:

1. test_verify_handles_nanosecond_timestamp: Verifies that the handler processes timestamps with nanosecond precision correctly.
2. test_verify_handles_microsecond_timestamp: Ensures the handler works with standard microsecond precision timestamps.
3. test_verify_rejects_old_timestamp: Checks that the handler rejects timestamps older than four minutes, utilizing a 7-digit nanosecond precision timestamp.
   Additionally, changes to azure.py ensure that nanosecond precision timestamps are truncated to six digits when processed, maintaining compatibility with Python's datetime handling.

If you have any questions or feedback for the Sentry team about this fix, please email [email protected] with the Run ID: 2538.

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All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.02%. Comparing base (ad92471) to head (1f4b054).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1069   +/-   ##
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  Coverage   96.02%   96.02%           
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  Files         828      828           
  Lines       19444    19447    +3     
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+ Hits        18671    18674    +3     
  Misses        773      773           

Flag	Coverage Δ
unit	92.30% <100.00%> (+<0.01%)	⬆️
unit-latest-uploader	92.30% <100.00%> (+<0.01%)	⬆️

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