Recatoring to improve nullable and readability of DataProtectedIdentityServerKeyMaterialConverter - #53

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, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Possible null reference argument for parameter 'pathMatch' in 'IApplicationBuilder MapExtensions.Map(IApplicationBuilder app, string pathMatch, Action<IApplicationBuilder> configuration)'.

The variable 'expectedHandle' is assigned but its value is never used

The variable 'expectedHandle' is assigned but its value is never used

The variable 'expectedHandle' is assigned but its value is never used

The variable 'e' is declared but never used

The variable 'e' is declared but never used

Possible null reference argument for parameter 'pathMatch' in 'IApplicationBuilder MapExtensions.Map(IApplicationBuilder app, string pathMatch, Action<IApplicationBuilder> configuration)'.

Possible null reference argument for parameter 'pathMatch' in 'IApplicationBuilder MapExtensions.Map(IApplicationBuilder app, string pathMatch, Action<IApplicationBuilder> configuration)'.

Possible null reference argument for parameter 'pathMatch' in 'IApplicationBuilder MapExtensions.Map(IApplicationBuilder app, string pathMatch, Action<IApplicationBuilder> configuration)'.