Zabbix/Postfix: Ensure drop-in dir exists

Signed-off-by: Greg Sutcliffe <fedora@emeraldreverie.org>

roles/base/tasks/postfix-monitoring.yml

@@ -38,6 +38,14 @@
   - postfix
   - zabbix_agent
 
+- name: Ensure Zabbix drop-in directory
+  file:
+    path: /etc/zabbix/zabbix_agentd.d
+    state: directory
+    mode: '0755'
+    owner: root
+    group: root
+
 - name: Install Zabbix agent config drop-in
   ansible.builtin.copy:
     src: postfix/zabbix-agent-dropin