refactor: reorganize the whole project layout

Co-authored-by: gabdevele <[email protected]>

app/api/proxy/router.py

@@ -1,4 +1,3 @@
-from core.security import require_authenticated_user
 from db.proxy import (
     create_proxy,
     delete_proxy,
@@ -9,8 +8,10 @@ from db.proxy import (
     list_proxies as list_proxy_documents,
 )
 from fastapi import APIRouter, Depends, HTTPException, status
+
+from core.security import require_authenticated_user
 from models.proxy import ProxyCreateInput, ProxyUpdateInput
-from utils.proxy.validator import ProxyCodeValidationError, validate_proxy_code
+from services.proxy.validator import ProxyCodeValidationError, validate_proxy_code
 
 router = APIRouter(
     prefix="/proxy",