fix error in gitignore

apps/invoicing/models.py

@@ -0,0 +1,28 @@
+from django.db import models
+
+from apps.core.models import TimeStampedModel, UUIDModel
+
+
+class Invoice(UUIDModel, TimeStampedModel):
+    class SyncState(models.TextChoices):
+        PENDING = "pending", "Pending"
+        PROCESSING = "processing", "Processing"
+        SYNCHRONIZED = "synchronized", "Synchronized"
+        FAILED = "failed", "Failed"
+        RETRYING = "retrying", "Retrying"
+        CANCELLED = "cancelled", "Cancelled"
+
+    order = models.ForeignKey("orders.ProcessingOrder", on_delete=models.PROTECT, related_name="invoices")
+    number = models.CharField(max_length=40, unique=True)
+    amount = models.DecimalField(max_digits=18, decimal_places=2)
+    currency = models.CharField(max_length=8, default="IRR")
+    sync_state = models.CharField(max_length=16, choices=SyncState.choices, default=SyncState.PENDING)
+    odoo_invoice_id = models.CharField(max_length=120, blank=True)
+    last_error = models.TextField(blank=True)
+    synced_at = models.DateTimeField(null=True, blank=True)
+
+    class Meta:
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return self.number