Added credentials for telegram bot

roles/sys-alm-telegram/tasks/main.yml

@@ -1,3 +1,15 @@
+- name: Fail if Telegram bot credentials are not set
+  assert:
+    that:
+      - telegram_bot_token != ""
+      - telegram_chat_id != ""
+    fail_msg: |
+      Telegram configuration is incomplete!
+      Please provide non‑empty values for:
+        - telegram_bot_token   # Your Telegram bot’s API token
+        - telegram_chat_id     # The Telegram chat ID to send messages to
+  when: run_once_systemd_notifier_telegram is not defined
+
 - name: install curl
   pacman: 
     name: curl