MCP servers SHOULD include a scope parameter in the WWW-Authenticate header as defined in RFC 6750 Section 3

[erwinkramer]

Implement https://modelcontextprotocol.io/specification/2025-11-25/basic/authorization#:~:text=MCP%20servers%20SHOULD%20include%20a%20scope%20parameter%20in%20the%20WWW%2DAuthenticate%20header%20as%20defined%20in%20RFC%206750%20Section%203%20to

[erwinkramer]

@abdebek your latest commits look great regarding this issue, any chance to release a new preview on NuGet?

[abdebek]

@erwinkramer I haven't tested it well enough yet, but we can have a preview release ofc.