Add host exclusion and improve UFW task reliability

Add `excluded` host group and skip offline hosts
Fix UFW service initialization command for Alpine Linux

homelab.yml

@@ -1,8 +1,24 @@
 # yaml-language-server: $schema=https://raw.githubusercontent.com/ansible/ansible-lint/main/src/ansiblelint/schemas/playbook.json
 ---
 - name: Homelab alignment
-  hosts: managed
+  hosts: managed:!excluded
   become: true
+  gather_facts: false
+  environment:
+    PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+  pre_tasks:
+    - name: Test connectivity
+      ansible.builtin.ping:
+      ignore_unreachable: true
+      register: ping_result
+
+    - name: Skip offline hosts
+      ansible.builtin.meta: end_host
+      when: ping_result.unreachable | default(false)
+
+    - name: Gather facts
+      ansible.builtin.setup:
 
   roles:
     - role: ufw