feat(models): add status field to Topup model with choices for Pending, Paid, and Cancelled ✨

billing/models.py

@@ -52,6 +52,15 @@ class Topup(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="topups")
     paid = models.BooleanField(default=False)
     paid_at = models.DateTimeField(null=True, blank=True)
+    status = models.CharField(
+        max_length=20,
+        choices=[
+            ("PENDING", "Pending"),
+            ("PAID", "Paid"),
+            ("CANCELLED", "Cancelled"),
+        ],
+        default="PENDING",
+    )
     mib_reference = models.CharField(default="", null=True, blank=True)
     expires_at = models.DateTimeField(null=True, blank=True)
     expiry_notification_sent = models.BooleanField(default=False)