Merge feature/network-target-vlan-tag: expose fixed VLAN tag for SDN vnets

napalm_device_types/models.py

@@ -741,9 +741,11 @@ class NetworkTargetDict(TypedDict):
     - OVS bridge: always vlan_aware (OVS bridges tag per-port regardless of a
       dedicated "VLAN aware" setting).
     - SDN vnet: never vlan_aware — the VLAN is already fixed by the vnet's zone/tag,
-      so a NIC attached to it must not also carry a ``vlan_tag``.
+      so a NIC attached to it must not also carry a ``vlan_tag``. That fixed VLAN
+      is surfaced via ``fixed_vlan_tag`` instead, for display purposes.
     """
 
     name: str  # Bridge or vnet name, usable directly as NICConfigDict.bridge
     kind: str  # "bridge" or "vnet"
     vlan_aware: bool  # True if a NICConfigDict.vlan_tag may be set on top of this target
+    fixed_vlan_tag: NotRequired[int | None]  # vnet only: the VLAN ID already baked into it