Cannot access cost centre ids through GHC.Stack.CCS interface

Event log profiling events represent the cost centre stack as a list of cost centre ids. Some tooling (e.g. hs-speedscope) even relies on this representation. It would be useful if we had some way of getting cost centre ids via GHC.Stack.CCS so we could link samples from the program to samples in the event log.

I think this will require a CLC proposal, which I've created here. Patch is !11798.

Edited Dec 20, 2023 by Finley McIlwaine

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