feat(): unit tests for domain entities and basic invariants

tests/unit/test_user_entity.py

@@ -0,0 +1,12 @@
+from datetime import UTC
+from uuid import UUID
+
+from template_project.application.user.entity import User
+
+
+def test_user_factory_creates_valid_user() -> None:
+    user = User.factory()
+
+    assert isinstance(user.id, UUID)
+    assert user.deleted_at is None
+    assert user.created_at.tzinfo == UTC