Improve the traffic fetching system

services/data/app/schemas/sales.py

@@ -3,7 +3,7 @@
 # ================================================================
 """Sales data schemas"""
 
-from pydantic import BaseModel, Field, validator
+from pydantic import BaseModel, Field, field_validator
 from datetime import datetime
 from typing import Optional, List, Dict, Any
 from uuid import UUID
@@ -20,7 +20,8 @@ class SalesDataCreate(BaseModel):
     source: str = Field(default="manual", max_length=50)
     notes: Optional[str] = Field(None, max_length=500)
     
-    @validator('product_name')
+    @field_validator('product_name')
+    @classmethod
     def normalize_product_name(cls, v):
         return v.strip().lower()