Agent host: the VM is now nisse, not nisse-host

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

deploy/agent-host/caddy/vault.dongar.net.caddy

@@ -6,5 +6,5 @@ vault.dongar.net {
 	@outside not remote_ip private_ranges
 	respond @outside 403
 
-	reverse_proxy nisse-host.garrett-hall.com:3000
+	reverse_proxy nisse.garrett-hall.com:3000
 }