remove pydantic from customer.py

src/customer.py

@@ -1,12 +1,12 @@
+from dataclasses import dataclass
 from uuid import UUID
-from pydantic import BaseModel
 from src.customer_attributes import CustomerAttributes
 from src.models import NKodePolicy
 from src.user import User
 from src.utils import xor_lists
 
-
-class Customer(BaseModel):
+@dataclass
+class Customer:
     customer_id: UUID
     nkode_policy: NKodePolicy
     attributes: CustomerAttributes