Hello! I have that same bass. I use roundwounds. Nickle roundwounds are a bit softer and easier on the fingerboard than steel. I'm currently using DR Sunbeams on that bass, and they sound great!
Fingerboard wear happens. It happens with all strings. Even with roundwounds, the wear will take a long time, and you can periodically (every 5 years or so) get the fingerboard dressed by a luthier. You can get the fingerboard epoxied if you want - it will change the sound somewhat, but will slow the wear process.
But all in all, the wear is not that big a deal, and is the price that you pay for playing the instrument.
Think of it like oil in your car - if you drive the car, the oil gets dirty, and every 3000 miles or so you have to change it. If you never drive the car, you can keep the oil clean, but you have a car to drive it, so change the oil when needed and don't worry about it.
You have a bass to play music on it.
In fact, you have a wonderful bass. Enjoy it to the fullest!