refactor(reaction): 下线 comment app

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

reaction/migrations/0002_delete_comment.py

@@ -0,0 +1,14 @@
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("reaction", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            sql="DROP TABLE IF EXISTS comment CASCADE;",
+            reverse_sql=migrations.RunSQL.noop,
+        ),
+    ]