core(minor): add new, optional description field to nonce

passbook/core/migrations/0002_nonce_description.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.6 on 2019-10-10 11:48
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_core', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='nonce',
+            name='description',
+            field=models.TextField(blank=True, default=''),
+        ),
+    ]