feat: Enhance security by adding @login_required to multiple views and replacing print statements with logger.debug

Co-authored-by: Copilot <copilot@github.com>

shorts/views.py

@@ -395,7 +395,6 @@ def mark_answer(request, exam_id, question_number, answer_id, override=False):
         elif answer_list[-1] == answer_id:
             previous_answer_id = answer_list[-2]
         else:
-            print(answer_list.index(answer_id))
             next_answer_id = answer_list[answer_list.index(answer_id) + 1]
             previous_answer_id = answer_list[answer_list.index(answer_id) - 1]
 
@@ -955,7 +954,6 @@ def question_findings(request, question_id, finding_pk=None):
 @require_POST
 def combine_images_side_by_side(request, question_id):
     image_ids = request.POST.getlist('combine-image-checkbox')
-    print(image_ids)
     if len(image_ids) != 2:
         return render(request, "shorts/combine_error.html", {"error": "Please select exactly two images."})
     question = get_object_or_404(Question, pk=question_id)