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-hlth-webserver/README.md

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+# sys-ctl-hlth-webserver
+
+## Description
+Verifies that each of your Nginx‐served domains returns an expected HTTP status (200, 301, etc.) and alerts on deviations.
+
+## Features
+- Scans your `nginx` server block `.conf` files for domains.
+- HEAD-requests each domain and compares against per-domain expected codes.
+- Reports any mismatches via `sys-ctl-alm-compose`.
+- Scheduled via a systemd timer for periodic health sweeps.
+
+## Usage
+Include this role, install `python-requests`, and define `on_calendar_health_nginx`.
+
+## Further Resources
+- For more details on nginx configurations, visit [nginx documentation](https://nginx.org/en/docs/).
+- Learn more about Ansible's `uri_module` [here](https://docs.ansible.com/ansible/latest/modules/uri_module.html).
+
+## Contributions
+This role was created with the assistance of ChatGPT. The conversation can be found [here](https://chat.openai.com/share/4033be29-12a6-40a3-bf3c-fc5d57dba8cb) and [here](https://chat.openai.com/share/7f3766d1-9db7-4976-8fe9-68d1142c0a78).