Showing commit messages about artemis

[krusche]

Good idea. @tobias-lippert is currently implementing a commit history view for instructors in the context of exams.

@tobias-lippert what is the status?

We could then also use this information in other places such as in the history for students.

We might want to save the commit message as part of the programming submission in the database. This would be faster than retrieving it from git each time.

[tobias-lippert]

As of now, we show the diff between the commit that belongs to the currently selected submission and the previous submission (I have to fix some issues there and write tests for it). And do not include any additional details about the commit in the view but we can certainly incorporate that and reuse it in another place.
I'd suggest to retrieve it from git in the first place as part of my PR and adding it to the database, when we add it to the student view where this information will be more frequently accessed.
Currently that's a WIP view. Of course, we can adjust the amount of data that we show in the student view in the end but I think this information could either be embedded in a similar way to the exercise details if it is a programming exercise and we reuse this component or we integrate the information into the list of results.