Caches suggested books

bookwyrm/views/feed.py

@@ -223,7 +223,6 @@ def feed_page_data(user):
 
     goal = models.AnnualGoal.objects.filter(user=user, year=timezone.now().year).first()
     return {
-        "suggested_books": get_suggested_books(user),
         "goal": goal,
         "goal_form": forms.GoalForm(),
     }

bookwyrm/views/reading.py

@@ -47,10 +47,11 @@ class ReadingStatus(View):
             return HttpResponseBadRequest()
 
         # invalidate the template cache
-        cache_key = make_template_fragment_key(
-            "shelve_button", [request.user.id, book_id]
-        )
-        cache.delete(cache_key)
+        cache_keys = [
+            make_template_fragment_key("shelve_button", [request.user.id, book_id]),
+            make_template_fragment_key("suggested_books", [request.user.id]),
+        ]
+        cache.delete_many(cache_keys)
 
         desired_shelf = get_object_or_404(
             models.Shelf, identifier=identifier, user=request.user