General question on "official" solutions

Once we have passed a course and have moved on to the next course of the DLS, will we be able to access the “official” solutions to the programming assignments in the completed course?

No, sorry, but there are no “official” solutions. There’s just no way to deal with that. The instant they were published, someone would put them up on github. Yes, it’s cheating and it’s against the rules, but there is no realistic way to police that. The Internet is a big place.