Resolve "User Story: Arrival at front desk / Check in"

Closes #29 (closed)

aleksis/apps/paweljong/migrations/0020_check_in.py

+# Generated by Django 3.2.13 on 2022-06-22 19:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('paweljong', '0019_retractions'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='eventregistration',
+            name='checked_in',
+            field=models.BooleanField(default=False, verbose_name='Checked in'),
+        ),
+        migrations.AddField(
+            model_name='eventregistration',
+            name='checked_in_date',
+            field=models.DateTimeField(blank=True, null=True, verbose_name='Checked in at'),
+        ),
+    ]