The same person can be defined multiple times

[reivilibre]

public async findPeopleWithId(personId: string): Promise<IPerson[]> { is awkward enough on its own, but what I only just realised is that a person may appear in multiple events with different roles.

This means that having the role on IPerson is pretty poor ­— I'm really not a fan of having multiple people per ID that correspond to the same physical human being acting in multiple capacities. Some denormalisation would be appreciated.