Fix chart rank and periods

vrobbler/apps/scrobbles/migrations/0024_chartrecord_period_end_chartrecord_period_start.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.1.5 on 2023-03-03 00:43
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('scrobbles', '0023_alter_audioscrobblertsvimport_options_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='chartrecord',
+            name='period_end',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='chartrecord',
+            name='period_start',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]