Question about adding a hook

I have an use case where it'd be very helpful to have a hook at the time of urgency calculation. Basically here: https://github.com/GothenburgBitFactory/taskwarrior/blob/1c11f8b650cdd15526c6694d9032b645485660fa/src/Task.cpp#L2202

Having such hook, while potentially detrimental to speed (like any other hook), would give advanced users a lot of flexibility to bring interesting "business" rules to the urgency calculation. Just as an example, what I'd like to do is change the urgency of a task based on a formula taking as input the value of a numeric UDA I defined.

I'm happy to implement it and make a PR, but before spending the time I'd like to know if there's interest and a feature like that has any chance of being considered for merging.

Thanks!