[5.1] Add new trusted AKV URLs for FR and DE

[paulmedynski]

Port of #3482 from main to release/5.1

• Added 4 new trusted AKV URLs.
• Fixed existing manual tests and added unit tests.
• Addressed incompatible .NET syntax that isn't supported by C# 9.0.

[Copilot]

Pull Request Overview

Port of #3482 from main to release/5.1, adding new Azure Key Vault endpoints for French and German sovereign clouds and updating tests.

• Extended AzureKeyVaultPublicDomainNames with additional public and HSM vault domains.
• Refactored InvalidAKVUrlTrustedEndpoints to return ArgumentException and centralized error message generation.
• Updated manual test project to include a new TrustedUrlsTest and refactored exception assertions in ExceptionTestAKVStore.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Microsoft.Data.SqlClient/add-ons/AzureKeyVaultProvider/Constants.cs	Added new trusted AKV endpoint domains for French and German sovereign clouds.
src/Microsoft.Data.SqlClient/add-ons/AzureKeyVaultProvider/Utils.cs	Changed InvalidAKVUrlTrustedEndpoints return type from Exception to ArgumentException.
src/Microsoft.Data.SqlClient/tests/ManualTests/AlwaysEncrypted/TrustedUrlsTest.cs	Introduced a manual test class to validate both valid and invalid trusted URLs.
src/Microsoft.Data.SqlClient/tests/ManualTests/AlwaysEncrypted/ExceptionTestAKVStore.cs	Refactored exception assertions to use TrustedUrlsTest.MakeInvalidVaultErrorMessage.
src/Microsoft.Data.SqlClient/tests/ManualTests/Microsoft.Data.SqlClient.ManualTesting.Tests.csproj	Updated compile includes: added TrustedUrlsTest.cs and reordered AKV setup files.

Comments suppressed due to low confidence (3)

src/Microsoft.Data.SqlClient/add-ons/AzureKeyVaultProvider/Constants.cs:20

• The addition of new trusted AKV domain names in Constants.AzureKeyVaultPublicDomainNames warrants unit tests to verify their acceptance by the validation logic, ensuring these domains are correctly allowed in automated (non-manual) tests.

            "vault.cloudapi.microsoft.scloud", // USSec

src/Microsoft.Data.SqlClient/tests/ManualTests/AlwaysEncrypted/TrustedUrlsTest.cs:35

• [nitpick] Duplicating the error message formatting logic in MakeInvalidVaultErrorMessage can lead to maintenance overhead if the production template changes; consider loading the actual template from the production resource (Strings.InvalidAkvKeyPathTrustedTemplate) or centralizing this logic.

        public static string MakeInvalidVaultErrorMessage(string url)

src/Microsoft.Data.SqlClient/tests/ManualTests/AlwaysEncrypted/TrustedUrlsTest.cs:24

• Using reflection to invoke the private ValidateNonEmptyAKVPath method is brittle and may break on internal refactorings; consider exposing a test-friendly public helper or validating through the public Encrypt/DecryptColumnEncryptionKey methods instead.

            _method = clazz.GetMethod(

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes missing coverage. Please review.

Project coverage is 69.29%. Comparing base (6af24bc) to head (0d77937).

Files with missing lines	Patch %	Lines
...lClient/add-ons/AzureKeyVaultProvider/Constants.cs	0.00%	18 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           release/5.1    #3483      +/-   ##
===============================================
- Coverage        71.81%   69.29%   -2.53%     
===============================================
  Files              293      293              
  Lines            61647    61656       +9     
===============================================
- Hits             44272    42723    -1549     
- Misses           17375    18933    +1558     

Flag	Coverage Δ
addons	0.00% <0.00%> (-92.39%)	⬇️
netcore	69.90% <ø> (-5.99%)	⬇️
netfx	69.49% <ø> (-0.06%)	⬇️

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