"2.4.8 All teams must submit their engineering journal prior to the competition. ", so yes it is mandatory.
If you haven't done so, yes do include those items. If you are familiar with the major leagues, it is somewhat like a TDP. So yes, things like schematics, 3D models, drawings, list of components, would be nice.
But in addition, please make an effort to include things like major problems faced and the corresponding solutions. And if possible share it to the forum/online! It's a bit wasted if you spend time on documentation but it doesn't get used - this applies to all teams of course.