Some refactoring, and added a script to regenerate variants

images/migrations/0008_imagevariant_regenerate.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2 on 2025-05-03 10:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("images", "0007_image_version_imagevariant_available_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="imagevariant",
+            name="regenerate",
+            field=models.BooleanField(default=False),
+        ),
+    ]