Add near-miss diagnostics and request count/unmatched endpoints to the admin API - #1521

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

XML comment is not placed on a valid language element

Non-nullable property 'PrefixForSavedMappingFile' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Url' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'WebProxySettings' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'ClientX509Certificate2ThumbprintOrSubjectName' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

XML comment is not placed on a valid language element

Non-nullable property 'PrefixForSavedMappingFile' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Url' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'WebProxySettings' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.