PATCH: Rename `user_id_attribute` to `userid_attribute` in Azure Connection Options

[duedares-rvj]

🔧 Changes

• This patch renames the user_id_attribute JSON field to userid_attribute in the Azure Connection Options struct.

  🔬 Testing

  • A test case was added to verify that valid values for userid_attribute are correctly passed and processed.

  📝 Checklist

  • [x] All new/changed/fixed functionality is covered by tests (or N/A)
  • [x] I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.81%. Comparing base (ac45d81) to head (6f45863).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #454 +/- ## ======================================= Coverage 95.81% 95.81% ======================================= Files 51 51 Lines 8461 8461 ======================================= Hits 8107 8107 Misses 236 236 Partials 118 118 ```

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