hosts: enable homelab-deploy listener on pgdb1, nats1, jelly01

Enable vault.enable and homelab.deploy.enable for these hosts to
allow NATS-based remote deployments and expose metrics on port 9972.

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

hosts/nats1/configuration.nix

@@ -59,5 +59,8 @@
   # Or disable the firewall altogether.
   networking.firewall.enable = false;
 
+  vault.enable = true;
+  homelab.deploy.enable = true;
+
   system.stateVersion = "23.11"; # Did you read the comment?
 }