Which options exist to implement an automatic cycle color change to all bulbs of a scene?

That’s possible. But I’m not deep enough in the bindings to find out yet. What different color coordinate systems are around? HSB looks to me like Hue, Saturation, Brightness. I called it CSB (Color, Saturation, Brightness).
A search for ‘color’ in the documentation brings up RGB (Red, Green, Blue?) sliders.
Another search for ‘hue’ brings up the ‘HUE Binding’, this is not installed here.

Both don’t help any further. If nobody comes up with some hints, I’m stuck here.

Perhaps not but the bulbs are Hue bulbs. So if the Hue binding needs to do such a translation the deconz binding will have to do the same translation.