fix: 마이그레이션 파일 추가

Signed-off-by: SaJH <wogur981208@gmail.com>

Author: JaeHyuckSa

app/event/sponsor/migrations/0015_alter_sponsor_options.py

@@ -0,0 +1,16 @@
+# Generated by Django 5.2 on 2025-08-05 12:04
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("sponsor", "0014_alter_sponsor_options_historicalsponsor_fixed_at_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="sponsor",
+            options={"ordering": ["name", "-fixed_at"]},
+        ),
+    ]