fix: optimize queryset in CourseListAPIView with select_related and improved filtering

apps/course/views/course.py

@@ -33,15 +33,6 @@ class CourseListAPIView(ListAPIView):
     filter_backends = [SearchFilter]
     search_fields = ['title', 'category__name', 'professor__fullname']
 
-    def get_queryset(self):
-        """
-        Optimized queryset with select_related for ForeignKey relationships
-        """
-        return Course.objects.select_related(
-            'category',
-            'professor'
-        ).exclude(status=Course.StatusChoices.INACTIVE)
-
     @swagger_auto_schema(
     operation_description=doc_course_list(),
     manual_parameters=[
@@ -82,7 +73,14 @@ class CourseListAPIView(ListAPIView):
         return super().get(request, *args, **kwargs)
 
     def get_queryset(self):
-        queryset = super().get_queryset()
+        """
+        Optimized queryset with select_related for ForeignKey relationships and filtering
+        """
+        queryset = Course.objects.select_related(
+            'category',
+            'professor'
+        ).exclude(status=Course.StatusChoices.INACTIVE)
+
         request = self.request
         filters = request.query_params