Align with HPO past medical history

[cmungall]

https://www.ebi.ac.uk/ols4/ontologies/hp/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FHP_0032443?lang=en

This branch is in some sense a recap of MRE, see

• #6

[mellybelly]

I don't think exposure history belongs in HPO, it is not a phenotype (nor abnormal). Let's discuss the use cases and how to best address them.

[diatomsRcool]

Hmmm. I thought we had covered everything in MRE

[matentzn]

@diatomsRcool can you find someone to work on this? I am happy to supervise/communicate/coordinate here!