Add django AK id to info dict of slot

AKModel/models.py

@@ -979,6 +979,7 @@ class AKSlot(models.Model):
                 "description": self.ak.description,
                 "reso": self.ak.reso,
                 "duration_in_hours": float(self.duration),
+                "django_ak_id": str(self.ak.pk),
                 },
             }