Fix issues reported by ansible-lint (var prefixes)

playbooks/roles/postgresql/handlers/main.yml

@@ -0,0 +1,6 @@
+---
+- name: Restart postgresql
+  ansible.builtin.systemd_service:
+    name: postgresql.service
+    state: restarted
+  become: true

playbooks/roles/postgresql/tasks/main.yml

@@ -58,14 +58,8 @@
       - contype: hostssl
         address: "::/0"
   become: true
-  register: pg_hba_reg
-
-- name: Restart postgresql on pg_hba change
-  ansible.builtin.systemd_service:
-    state: restarted
-    name: postgresql
-  when: pg_hba_reg.changed # noqa: no-handler TODO can we add a handler here?
-  become: true
+  notify:
+    - Restart postgresql
 
 - name: Start postgresql
   ansible.builtin.systemd_service:
@@ -80,11 +74,11 @@
     name: "{{ item.name }}"
     value: "{{ item.value }}"
   loop: "{{ postgresql_set_vars | dict2items(key_name='name', value_name='value') }}"
-  register: set
+  register: postgresql_set
 
 - name: Restart postgresql
   ansible.builtin.systemd_service:
     state: restarted
     name: postgresql
-  when: set.results | postgresql_restart_required
+  when: postgresql_set.results | postgresql_restart_required
   become: true