Refactor systemctl services and categories due to alarm bugs

This commit restructures systemctl service definitions and category mappings.

Motivation: Alarm-related bugs revealed inconsistencies in service and role handling.

Preparation step: lays the groundwork for fixing the alarm issues by aligning categories, roles, and service templates.

roles/sys-ctl-cln-bkps/README.md

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+# Cleanup Backups Service
+
+## Description
+
+This role automates the cleanup of old backups by executing a Python script that deletes outdated backup versions based on disk usage thresholds. It ensures that backup storage does not exceed a defined usage percentage.
+
+## Overview
+
+Optimized for effective disk space management, this role:
+- Installs required packages (e.g. [lsof](https://en.wikipedia.org/wiki/Lsof) and [psutil](https://pypi.org/project/psutil/)) using pacman.
+- Creates a directory for storing cleanup scripts.
+- Deploys a Python script that deletes old backup directories when disk usage is too high.
+- Configures a systemd service to run the cleanup script, with notifications via [sys-ctl-alm-compose](../sys-ctl-alm-compose/README.md).
+
+## Purpose
+
+The primary purpose of this role is to maintain optimal backup storage by automatically removing outdated backup versions when disk usage exceeds a specified threshold.
+
+## Features
+
+- **Automated Cleanup:** Executes a Python script to delete old backups.
+- **Threshold-Based Deletion:** Removes backups based on disk usage percentage.
+- **Systemd Integration:** Configures a systemd service to run cleanup tasks.
+- **Dependency Integration:** Works in conjunction with related roles for comprehensive backup management.
+
+## Other Resources
+- https://stackoverflow.com/questions/48929553/get-hard-disk-size-in-python