feat: add show filter to schedule endpoint

program/filters.py

@@ -165,6 +165,13 @@ class ShowFilterSet(StaticFilterHelpTextMixin, filters.FilterSet):
         ]
 
 
+class ScheduleFilterSet(filters.FilterSet):
+    show_ids = IntegerInFilter(
+        field_name="show",
+        help_text="Return only schedules that belong to the specified show(s).",
+    )
+
+
 class TimeSlotFilterSet(filters.FilterSet):
     order = filters.OrderingFilter(
         fields=[field.name for field in models.TimeSlot._meta.get_fields()]

program/views.py

@@ -559,6 +559,7 @@ class APIScheduleViewSet(
     queryset = Schedule.objects.all()
     serializer_class = ScheduleSerializer
     pagination_class = LimitOffsetPagination
+    filterset_class = filters.ScheduleFilterSet
     permission_classes = [permissions.DjangoModelPermissionsOrAnonReadOnly]
 
     def get_serializer_class(self):