feat(billing): WIP Add Topup model, filters, serializers, and views for topup management ✨

billing/migrations/0006_topup_mib_reference.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.2 on 2025-07-03 11:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("billing", "0005_alter_payment_options_payment_mib_reference"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="topup",
+            name="mib_reference",
+            field=models.CharField(blank=True, default="", null=True),
+        ),
+    ]