I love a good mystery bike like this!
Has it been faced on the BB and HT? Factory Faced first, then coated over.
Cable routing for the front mech is the later style for non-pulley. This was on 1995+
Geometry looks like it is for Suspension fork. 1995+ would be.
Any residue from edges of decal? This might show if it were chevron decals on it at any time.
Powder looks to be the stock purple that Bontrager offered. But could have been redone as it is a stock color.
Some frames woud fail when there was no gusset behind the seattube. Many local frame builders could do a fix on it. (Some pics of that area behind and a side shot could tell us more) Bonty gusset is square with a keyhole.
So far, it might be from the factory and might not - if not perhaps a one off or employee bike.
Or it might have been repaired by a local framebuilder and re-powdered purple.
Light. Strong. Cheap. I've picked 2 too many.