added test playbook

ansible/playbooks/test_connectivity.yml

@@ -0,0 +1,16 @@
+---
+# FILE: playbooks/test_connectivity.yml
+# Simple test playbook to validate Semaphore can connect and run tasks
+
+- name: Test connectivity
+  hosts: all
+  gather_facts: true
+
+  tasks:
+    - name: Print hostname
+      ansible.builtin.debug:
+        msg: "Connected to {{ inventory_hostname }} ({{ ansible_hostname }})"
+
+    - name: Print OS info
+      ansible.builtin.debug:
+        msg: "{{ ansible_distribution }} {{ ansible_distribution_version }}"