If you want the fibro circuit protected by a fuse then you’d have to use a fused spur but what are you protecting?? If you have a RCD (ELCB) or whatever they are called in your country they will protect persons, a fuse doesnt.
If you want to detect a switch left on you’d have to also put a smart device in that circuit to run that automation.
I was originally trying to give you a ‘free’ solution, but if your going to spend money and want to do other things. I would suggest a better solution would be to use something like a flic button as a local way to switch your fibro and just leave your circuit as is. You can then setup an automation to switch the fibro switch off after a certain time after the flic button has turned it on.
Hope this helps