feat(bcn01-lab): onboard BCN01-LAB site and extend module with WAN2 support

- Add sites/BCN01-LAB with full Meraki configuration: VLANs, SSIDs,
  switch ports, 802.1X policy, firewall rules, WAN uplinks and warm spare
- Extend modules/meraki-site to support wan2_* fields in mx_wan_uplinks

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sites/BCN01-LAB/main.tf

@@ -0,0 +1,38 @@
+terraform {
+  backend "s3" {}  # Config injected via -backend-config in CI (see backend.hcl at repo root)
+  required_version = ">= 1.5.0"
+  required_providers {
+    meraki = {
+      source  = "CiscoDevNet/meraki"
+      version = "1.9.0"
+    }
+  }
+}
+
+provider "meraki" {}
+
+locals {
+  organization_name = "Adevinta Information Services SLU"
+  network_name      = "BCN01-LAB"
+}
+
+module "bcn01_lab" {
+  source = "../../modules/meraki-site"
+
+  organization_name         = local.organization_name
+  network_name              = local.network_name
+  switch_vlans              = local.switch_vlans
+  firewall_rules            = local.firewall_rules
+  wireless_ssids            = local.wireless_ssids
+  radius_secret             = var.radius_secret
+  wifi_password_psk         = var.wifi_password_psk
+  switch_access_policies    = local.switch_access_policies
+  switch_port_configs       = local.switch_port_configs
+  switch_stack_port_configs = local.switch_stack_port_configs
+  switch_named_port_configs = local.switch_named_port_configs
+  switch_management_vlan    = local.switch_management_vlan
+  stack_routing_interfaces  = local.stack_routing_interfaces
+  appliance_ports           = local.appliance_ports
+  mx_wan_uplinks            = local.mx_wan_uplinks
+  mx_warm_spare             = local.mx_warm_spare
+}