Net10 upgrade and threading fixes - #19

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/

'SecurityAction' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityPermissionAttribute' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityAction' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityPermissionAttribute' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityAction' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityPermissionAttribute' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityAction' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityPermissionAttribute' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityAction' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)

'SecurityPermissionAttribute' is obsolete: 'Code Access Security is not supported or honored by the runtime.' (https://aka.ms/dotnet-warnings/SYSLIB0003)