Upgrade ruff to latest

This newest version takes a number of rules out of preview mode, which
is why we include fixes here!

ws/api_views.py

@@ -224,7 +224,10 @@ def signups_to_update(signup_list, trip):
         # Return unevaluated QuerySet objects (allows update() and all() calls)
         keep_on_trip = (
             trip.signup_set.filter(pk__in=normal_signups)
-            .extra(select={"ordering": f"case {ordering} end"}, order_by=("ordering",))
+            .extra(  # noqa: S610
+                select={"ordering": f"case {ordering} end"},
+                order_by=("ordering",),
+            )
             .select_related("waitlistsignup")
         )
         to_delete = trip.signup_set.filter(pk__in=deletions)

ws/utils/dates.py

@@ -224,7 +224,4 @@ def ws_lectures_complete() -> bool:
 
     if trips_this_ws.filter(trip_date__lt=today):
         return True
-    if trips_this_ws.filter(trip_date__gte=today) and after_thursday:
-        return True
-    # It's Winter School, but it's not late enough in the first week
-    return False
+    return trips_this_ws.filter(trip_date__gte=today).exists() and after_thursday

ws/utils/ratings.py

@@ -181,9 +181,8 @@ def _chair_should_recommend(app: AnnotatedApplication) -> bool:
             return False
         if app.num_recs:  # The chair has already made a recommendation
             return False
-        if app.num_ratings:  # The application received a rating
-            return False
-        return True
+        # If the application received a rating, we don't need recommendations
+        return not app.num_ratings
 
     def needs_rec(
         self,

ws/wsgi.py

@@ -10,7 +10,7 @@
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "ws.settings")
 
-from django.core.wsgi import get_wsgi_application  # noqa: E402,I001
+from django.core.wsgi import get_wsgi_application  # noqa: I001
 
 
 application = get_wsgi_application()