API and database models refactoring

app/services/product_service.py

@@ -14,9 +14,10 @@ from typing import Generator, List, Optional
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
-from models.api_models import (ProductCreate, ProductUpdate,
-                               StockLocationResponse, StockSummaryResponse)
-from models.database_models import Product, Stock
+from models.api.product import ProductCreate, ProductUpdate
+from models.api.stock import StockLocationResponse, StockSummaryResponse
+from models.database.product import Product
+from models.database.stock import Stock
 from utils.data_processing import GTINProcessor, PriceProcessor
 
 logger = logging.getLogger(__name__)