Unknown state - Auto verify count via VarPlayer

The game sets a `VarPlayer` for a pouch should it's menu option change from fill/empty. I believe it's correlated to the MenuOption that shows only when banking. Regardless, we can use the value to see if a pouch is either

- Fully filled
- Not filled fully

If a pouch is fully filled, then we can set and verify that pouch's state. Don't update the decay count.

Start by locating the VarPlayer handling and the MenuOption that appears while banking. Trace how pouch fullness and decay counts are currently updated, then verify that a fully filled pouch gets its state set without updating the decay count.

Written by the indexing model from the issue text.