Quaestor-Complete-Event names a function, with lambda list (EVENT SCORE &OPTIONAL MEDAL):
Complete EVENT with SCORE and MEDAL earned.
See TOOTSVILLE INFINITY-END-EVENT for details of the procedure.
If EVENT is a purchase, then purchase the associated store item; otherwise, perform whatever specific event side-effects are related to the item template.
Defined in file src/quaestor.lisp.