ValueRange by Entity for ListVariables

[ge0ffrey]

For a case like this:

@PEntity
class Vehicle {
   @PListVariable
   List<Visit> visits;
   ...
}

with 50k visits, the Construction Heuristic runs very long.

For Shift to Employee assignments, can we can fix such issues with ValueRange by Entity.
Unfortunately, PlanningListVariable doesn't support that yet.