Fix port-traffic discover 500 from missing settings import.

Modular split left discover_ports referencing settings without importing it, which raised NameError on pull-ports.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/port_traffic_devices.py

@@ -10,6 +10,7 @@ from fastapi import HTTPException
 from sqlalchemy.orm import Session
 
 from .cli_resolve import resolve_cli_target
+from .config import settings
 from .models import (
     ManagedNE,
     PortTrafficDevice,