Add redirect demo

backend/right_tree/api/data/fixtures/006_zones.json

@@ -690,7 +690,7 @@
             "name": "SPRAY ZONE",
             "variant": "Coastal",
             "refined_variant": "Bush Edge",
-            "redirect_habitat": null,
+            "redirect_habitat": 2,
             "ignore_soil_order_filter": false,
             "ignore_location_filter": false
         }

backend/right_tree/api/data/fixtures/007_sample_habitat_images.json

@@ -16,5 +16,14 @@
             "name": "Salt Marsh",
             "image_filename": "03-coastal-grass-reeds-scrub.png"
         }
+    },
+    {
+        "model": "api.habitatimage",
+        "pk": 3,
+        "fields": {
+            "habitat": 2,
+            "name": "Bush Hillsides",
+            "image_filename": "07-riparian-bush-hillsides.png"
+        }
     }
 ]