fix: improve maintenance and synchronize live conversations

backend/tests/repo/test_people_repo.py

@@ -190,7 +190,7 @@ def test_phone_identifies_and_is_searchable(repo, db, test_organization_id):
 
 def test_update_person_edits_and_guards(repo, db, test_organization_id):
     person = _customer(db, test_organization_id)
-    other = _customer(db, test_organization_id, phone="+15550001111")
+    _customer(db, test_organization_id, phone="+15550001111")
 
     # Set + correct (overwrite is allowed here — it's the explicit human path)
     updated, error = repo.update_person(test_organization_id, person.id,