While objects are more persistent than Prolog variables, there is no automatic way to save objects from one execution of your program to the next. Hence they are less persistent than the clauses in the Prolog database.
If you need to save a set of objects from one Prolog session to another, copy the objects to the Prolog database as terms, and save them to a QOF file. Then, after you reload the QOF file, rebuild the objects. Keep in mind that addresses are not valid from one session to another.
In short, there is no way to avoid initializing objects at run time.