Restaura imports perdidos na resolução de conflitos de #3849/#3855 (#3867)

- painel/urls.py: volta a importar votante_status (adicionado em #3855),
  perdido ao reescrever o import em #3849; causava NameError na
  inicialização.
- sessao/views.py: importa Prefetch, usado pelos querysets de #3849 mas
  ausente após o merge; quebrava as listagens de Ordem do Dia/Expediente.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

sapl/painel/urls.py

@@ -2,7 +2,8 @@ from django.conf.urls import url
 
 from .apps import AppConfig
 from .views import (cronometro_painel, get_dados_painel, painel_view,
-                    switch_painel, verifica_painel, votante_view)
+                    switch_painel, verifica_painel, votante_status,
+                    votante_view)
 
 app_name = AppConfig.name
 

sapl/sessao/views.py

@@ -10,7 +10,7 @@ from django.contrib.auth.decorators import permission_required
 from django.contrib.auth.mixins import PermissionRequiredMixin
 from django.core.exceptions import ObjectDoesNotExist
 from django.db import IntegrityError, transaction
-from django.db.models import Max, Q
+from django.db.models import Max, Prefetch, Q
 from django.http import JsonResponse
 from django.http.response import Http404, HttpResponseRedirect
 from django.urls import reverse