Add CID user support in collection history and reset answers functionality

generic/models.py

@@ -905,9 +905,10 @@ class ExamOrCollectionGenericBase(models.Model, AuthorMixin):
     def get_question_user_user_answer(self, question_index, user):
         raise NotImplementedError
 
-    def get_cid_user_exams(
+    def get_cid_and_user_exams(
         self, cid_user: Optional["CidUser"] = None, user_user: User | None = None
     ) -> "CidUserExam":
+        """Returns a queryset of CidUserExam for this exam/collection"""
         content_type = ContentType.objects.get_for_model(self)
         if cid_user is None and user_user is None:
             return CidUserExam.objects.filter(
@@ -924,6 +925,35 @@ class ExamOrCollectionGenericBase(models.Model, AuthorMixin):
                     content_type=content_type, object_id=self.pk, user_user=user_user
                 )
 
+    def get_cid_exams(self, cid_user: Optional["CidUser"]= None) -> "CidUserExam":
+        """Returns a queryset of CidUserExam for this exam/collection"""
+        content_type = ContentType.objects.get_for_model(self)
+
+        if cid_user is None:
+            # Only return pure CID entries (cid_user set, user_user null)
+            return CidUserExam.objects.filter(
+                content_type=content_type,
+                object_id=self.pk,
+                cid_user__isnull=False,
+                user_user__isnull=True,
+            )
+        return CidUserExam.objects.filter(
+            content_type=content_type, object_id=self.pk, cid_user=cid_user
+        )
+
+    def get_user_exams(self, user_user: Optional[User] = None) -> "CidUserExam":
+        """Returns a queryset of CidUserExam for this exam/collection"""
+        content_type = ContentType.objects.get_for_model(self)
+        if user_user is None:
+            return CidUserExam.objects.filter(
+                content_type=content_type, object_id=self.pk, user_user__isnull=False, cid_user__isnull=True
+            )
+        return CidUserExam.objects.filter(
+            content_type=content_type, object_id=self.pk, user_user=user_user
+        )
+
+    
+
     def clone_model(self):
         M2M_fields = (
             "exam_questions",