feat: add exportar field to Curso, defaulting extinct courses to false

Lets operators exclude a course from the aluno export file without
deleting it. Existing courses already marked "Em extinção" are
backfilled to exportar=False by the migration.

core/migrations/0014_curso_exportar.py

@@ -0,0 +1,33 @@
+# Generated by Django 5.2.14 on 2026-07-06 18:46
+
+from django.db import migrations, models
+
+
+def marcar_cursos_extintos_como_nao_exportar(apps, schema_editor):
+    Curso = apps.get_model("core", "Curso")
+    Curso.objects.filter(
+        situacao_funcionamento_curso__iregex=r"^em extin[cç][aã]o$"
+    ).update(exportar=False)
+
+
+def reverter(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0013_pessoa_atualizado_manualmente_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='curso',
+            name='exportar',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.RunPython(
+            marcar_cursos_extintos_como_nao_exportar,
+            reverter,
+        ),
+    ]

core/models.py

@@ -68,6 +68,7 @@ class Curso(models.Model):
     situacao_funcionamento_curso = models.CharField(max_length=100, blank=True)
     licenciatura = models.BooleanField(default=False)
     ead = models.BooleanField(default=False)
+    exportar = models.BooleanField(default=True)
     carga_horaria_total = models.PositiveIntegerField()
     polo = models.ForeignKey(
         "Polo",

core/views.py

@@ -113,6 +113,7 @@ CRUD_CONFIGS = {
             "ead",
             "polo",
             "carga_horaria_total",
+            "exportar",
         ),
         search_fields=(
             ("codigo_mec", "int"),