hosts: add testvm01, testvm02, testvm03 test hosts

Three permanent test hosts for validating deployment and bootstrapping
workflow. Each host configured with:
- Static IP (10.69.13.20-22/24)
- Vault AppRole integration
- Bootstrap from deploy-test-hosts branch

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

hosts/testvm02/configuration.nix

@@ -0,0 +1,66 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [
+    ../template2/hardware-configuration.nix
+
+    ../../system
+    ../../common/vm
+  ];
+
+  # Host metadata (adjust as needed)
+  homelab.host = {
+    tier = "test";  # Start in test tier, move to prod after validation
+  };
+
+  nixpkgs.config.allowUnfree = true;
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/vda";
+
+  networking.hostName = "testvm02";
+  networking.domain = "home.2rjus.net";
+  networking.useNetworkd = true;
+  networking.useDHCP = false;
+  services.resolved.enable = true;
+  networking.nameservers = [
+    "10.69.13.5"
+    "10.69.13.6"
+  ];
+
+  systemd.network.enable = true;
+  systemd.network.networks."ens18" = {
+    matchConfig.Name = "ens18";
+    address = [
+      "10.69.13.21/24"
+    ];
+    routes = [
+      { Gateway = "10.69.13.1"; }
+    ];
+    linkConfig.RequiredForOnline = "routable";
+  };
+  time.timeZone = "Europe/Oslo";
+
+  nix.settings.experimental-features = [
+    "nix-command"
+    "flakes"
+  ];
+  nix.settings.tarball-ttl = 0;
+  environment.systemPackages = with pkgs; [
+    vim
+    wget
+    git
+  ];
+
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  networking.firewall.enable = false;
+
+  system.stateVersion = "25.11"; # Did you read the comment?
+}

hosts/testvm02/default.nix

@@ -0,0 +1,5 @@
+{ ... }: {
+  imports = [
+    ./configuration.nix
+  ];
+}