Feature/remodel router product

The remodel on the router side is finished, IAS resources will be part of phase 2

gso/utils/helpers.py

@@ -72,7 +72,7 @@ def available_interfaces_choices(router_id: UUID, speed: str) -> Choice | None:
 
 
 def available_interfaces_choices_including_current_members(
-    router_id: UUID | UUIDstr,
+    router_id: UUID,
     speed: str,
     interfaces: list[IptrunkInterfaceBlock],
 ) -> Choice | None:
@@ -113,14 +113,14 @@ def available_lags_choices(router_id: UUID) -> Choice | None:
     return Choice("ae iface", zip(side_a_ae_iface_list, side_a_ae_iface_list, strict=True))  # type: ignore[arg-type]
 
 
-def get_router_vendor(router_id: UUID) -> str:
+def get_router_vendor(router_id: UUID) -> RouterVendor:
     """Retrieve the vendor of a router.
 
     :param router_id: The :term:`UUID` of the router.
     :type router_id: :class:`uuid.UUID`
 
     :return: The vendor of the router.
-    :rtype: str:
+    :rtype: RouterVendor:
     """
     return Router.from_subscription(router_id).vendor