Migrate some models in a new app

dcc/metadata/migrations/0002_decoder_version.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0 on 2021-12-20 21:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='decoder',
+            name='version',
+            field=models.CharField(blank=True, max_length=64),
+        ),
+    ]