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

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

sbas/views.py

@@ -225,9 +225,15 @@ class AuthorOrCheckerRequiredMixin(object):
 #    return render(request, "sbas/question_detail.html", {"question": question})
 
 
+@login_required
 def active_exams(request):
+    """List all active SBA exams (candidate-facing).
+
+    Scope: authenticated users only.
+    Functionality: returns all non-archived active exams as a list for candidates
+    to take.
+    """
     exams = Exam.objects.all()
-    print(exams)
 
     active_exams = []