fix: detect tailscale tag permission errors and clean access output

ansible/roles/observability/tasks/main.yml

@@ -201,17 +201,17 @@
       debug:
         msg: |
           Observability stack deployed with Tailscale access!
-          
+
           Grafana: http://grafana{% if grafana_lb_ip.stdout | default('') | length > 0 %} (or http://{{ grafana_lb_ip.stdout }}){% endif %}
           Prometheus: http://prometheus{% if prometheus_lb_ip.stdout | default('') | length > 0 %} (or http://{{ prometheus_lb_ip.stdout }}){% endif %}
-          
+
           Login: admin / {{ grafana_password_effective }}
-          
+
           Access via:
           - MagicDNS: http://grafana or http://prometheus (if enabled)
           - Direct endpoint: {% if grafana_lb_ip.stdout | default('') | length > 0 %}http://{{ grafana_lb_ip.stdout }}{% else %}(pending){% endif %} / {% if prometheus_lb_ip.stdout | default('') | length > 0 %}http://{{ prometheus_lb_ip.stdout }}{% else %}(pending){% endif %}
           - Tailnet FQDN: http://grafana.{{ tailscale_tailnet | default('tailnet.ts.net') }}
-          
+
           Note: Ensure Tailscale Kubernetes Operator is installed first
   when:
     - tailscale_oauth_client_id | default('') | length > 0