Address SonarQube code smells

I fixed the ones I could. It was quick. I think it's pointless to try to fix https://sonarqube.software.geant.org/project/issues?branch=feature%2FNAT-356-sonarqube-code-smells&id=gso&open=AYvXVReaO1NWXaQ602V0&resolved=false because it's by design, but correct me if I'm wrong.

gso/api/v1/imports.py

@@ -9,16 +9,14 @@ from fastapi.routing import APIRouter
 from orchestrator.security import opa_security_default
 from orchestrator.services import processes
 from pydantic import BaseModel, root_validator, validator
-from pydantic.fields import ModelField
 
 from gso.products.product_blocks.iptrunk import IptrunkType, PhyPortCapacity
 from gso.products.product_blocks.router import RouterRole, RouterVendor
 from gso.products.product_blocks.site import SiteTier
 from gso.services import subscriptions
 from gso.services.crm import CustomerNotFoundError, get_customer_by_name
-from gso.workflows.site.base_site_model import BaseSiteModel
 from gso.utils.helpers import LAGMember
-
+from gso.workflows.site.base_site_model import BaseSiteValidatorModel
 
 router = APIRouter(prefix="/imports", tags=["Imports"], dependencies=[Depends(opa_security_default)])
 
@@ -30,7 +28,7 @@ class ImportResponseModel(BaseModel):
     detail: str
 
 
-class SiteImportModel(BaseSiteModel):
+class SiteImportModel(BaseSiteValidatorModel):
     """The required input for importing an existing :class:`gso.products.product_types.site`."""
 
     site_name: str