This commit refactors the models in the 'models' app, specifically 'clients' and 'services' modules. It includes the PhoneNumberField in the Client model and adds a new Credential model to the services module. The Service model has been modified to include new fields and relationships.

src/models/base.py

@@ -0,0 +1,9 @@
+from django.db import models
+
+
+class TimeStampedModel(models.Model):
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        abstract = True