F# dotnet 8 isolated not working with attributes

[helgeu]

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We are using f# and Darkloop extension and this works very nicely with Azure functions in process mode. We are now moving over to dotnet 8 and isolated but this seems to not work as expected.

I have created a PR with basic code for same F# code as in the C# samples. The expected is that this should give 401s but the attribute is not at all honored as with this code.

Thanks for your great work btw!