Reserve activation duration

Faster reserves are typically required only for a shorter period of time (e.g. 15 minutes). This should be accounted for when providing reserves from storages. We should add reserve_activation_duration to p_groupReserves or p_groupReserves3D and update state constraints.

There could also be a further reactivation requirement: how fast the unit needs to be ready to be activated again for the same purpose. Even though this is a thing in some systems, maybe not worthwhile to be implemented in Backbone unless there is an explicit need.