remove old import

app/api/customers.py

@@ -16,6 +16,8 @@ from app.auth.security import get_current_user
 from app.services.cache import invalidate_search_cache
 from app.services.customers_search import apply_customer_filters, apply_customer_sorting, prepare_customer_csv_rows
 from app.services.query_utils import apply_sorting, paginate_with_total
+from app.utils.logging import app_logger
+from app.utils.database import db_transaction
 
 router = APIRouter()
 
@@ -321,14 +323,15 @@ async def create_customer(
         )
     
     customer = Rolodex(**customer_data.model_dump())
-    db.add(customer)
-    db.commit()
-    db.refresh(customer)
+    with db_transaction(db) as session:
+        session.add(customer)
+        session.flush()
+        session.refresh(customer)
     
     try:
         await invalidate_search_cache()
-    except Exception:
-        pass
+    except Exception as e:
+        app_logger.warning(f"Failed to invalidate search cache: {str(e)}")
     return customer
 
 
@@ -352,12 +355,13 @@ async def update_customer(
     for field, value in customer_data.model_dump(exclude_unset=True).items():
         setattr(customer, field, value)
     
-    db.commit()
-    db.refresh(customer)
+    with db_transaction(db) as session:
+        session.flush()
+        session.refresh(customer)
     try:
         await invalidate_search_cache()
-    except Exception:
-        pass
+    except Exception as e:
+        app_logger.warning(f"Failed to invalidate search cache: {str(e)}")
     return customer
 
 
@@ -376,12 +380,12 @@ async def delete_customer(
             detail="Customer not found"
         )
     
-    db.delete(customer)
-    db.commit()
+    with db_transaction(db) as session:
+        session.delete(customer)
     try:
         await invalidate_search_cache()
-    except Exception:
-        pass
+    except Exception as e:
+        app_logger.warning(f"Failed to invalidate search cache: {str(e)}")
     return {"message": "Customer deleted successfully"}