Fillet (Round the Vertex with an Arc) a 3D Polyline

I want to make constant Radius Arf of the Lines of a 3D-Polyline, making it tangent to both lines. Like this:

Fillet Curve Node — Blender Manual

I Saw a similar topic but for a closed Form:

2D arc fillet using VTK - Support - VTK

Best Regards