fix: improve maintenance and synchronize live conversations

backend/tests/repo/test_customer_repo.py

@@ -15,9 +15,8 @@ limitations under the License.
 """
 
 import pytest
-from app.models.customer import Customer
 from app.repositories.customer import CustomerRepository
-from uuid import UUID, uuid4
+from uuid import uuid4
 
 @pytest.fixture
 def customer_repo(db):
@@ -446,7 +445,6 @@ class TestPhoneIdentityHazards:
 
         # Simulate losing the race: our lookup saw nothing, the insert collides.
         calls = {"n": 0}
-        real_create = customer_repo.create_customer
 
         def racing_create(*args, **kwargs):
             calls["n"] += 1