Evaluate None token passed to context.detach

[xrmx]

Evaluate the users of the context api to check that the callers of the detach function are passing a token that is not None.
This can be checked by inspection or by throwing pyright at the instrumentation code and stasrt fixing any typing issue.

For finding entries search for detach(token)

[aryabharat]

@xrmx can i pick this ?

[xrmx]

@aryabharat When you are ready to work on this just state so in a comment and we'll consider this assigned to you for one week.

[aryabharat]

@xrmx sure.
Should we handle the None check wherever context.detach() is called?"