12V Battery Voltage Management

Hello,

I was going over the following page that describes deep cycle batteries and a couple of
things they mention intrigued me:

Deep Cycle Battery FAQ Capacity

A couple of statements they make are:
"

Also, there is an upper limit - a battery that is continually cycled 5% or less will usually not last as long as one cycled down 10%."​

"

For longest life, batteries should stay in the green zone."​

The "green zone" in the second statement refers to 40% to 80% SOC.

Are the above statements applicable to the Prius 12V battery and if so, is there any voltage management logic employed by Prius to make sure the above are satisfied. My understanding
is that the HV battery will supply a steady 13.6V to charge the 12V battery from the point the car
is in Ready state until switched off. Would it not cause it to run afoul of the above statements?

Thanks.