hosts: add pn01 and pn02 (ASUS PN51 mini PCs)

Add two ASUS PN51 hosts on VLAN 12 for stability testing.
pn01 at 10.69.12.60, pn02 at 10.69.12.61, both test-tier compute role.

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

hosts/pn01/configuration.nix

@@ -0,0 +1,51 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../../system
+  ];
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  networking.hostName = "pn01";
+  networking.domain = "home.2rjus.net";
+  networking.useNetworkd = true;
+  networking.useDHCP = false;
+  networking.firewall.enable = false;
+  services.resolved.enable = true;
+  networking.nameservers = [
+    "10.69.13.5"
+    "10.69.13.6"
+  ];
+
+  systemd.network.enable = true;
+  systemd.network.networks."enp2s0" = {
+    matchConfig.Name = "enp2s0";
+    address = [
+      "10.69.12.60/24"
+    ];
+    routes = [
+      { Gateway = "10.69.12.1"; }
+    ];
+    linkConfig.RequiredForOnline = "routable";
+  };
+
+  time.timeZone = "Europe/Oslo";
+
+  homelab.host = {
+    tier = "test";
+    priority = "low";
+    role = "compute";
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  system.stateVersion = "25.11";
+}