added Transition Domain model

src/registrar/models/transition_domain.py

@@ -0,0 +1,45 @@
+from django.db import models
+
+from .utility.time_stamped_model import TimeStampedModel
+
+class TransitionDomain(TimeStampedModel):
+    """Transition Domain model stores information about the state of a domain upon transition between registry providers"""
+
+    class StatusChoices(models.TextChoices):
+        CREATED = "created", "Created"
+        HOLD = "hold", "Hold"
+
+    username = models.TextField(
+        null=False,
+        blank=False,
+        verbose_name="Username",
+        help_text="Username - this will be an email address",
+    )
+    domain_name = models.TextField(
+        null=True,
+        blank=True,
+        verbose_name="Domain name",
+    )
+    status = models.CharField(
+        max_length=255,
+        null=False,
+        blank=True,
+        choices=StatusChoices.choices,
+        verbose_name="Status",
+        help_text="domain status during the transfer",
+    )
+    ignoreServerHold = models.BooleanField(
+        null=False,
+        default=False, #--COMMENT: this was not specified in the ticket #921
+        verbose_name="ignore Server Hold",
+        help_text="specifies whether to ignore server hold",
+    )
+    email_sent = models.BooleanField(
+        null=False,
+        default=False, 
+        verbose_name="email sent",
+        help_text="indicates whether email was sent",
+    )
+
+    def __str__(self):
+        return self.username