Refactor: migrate cmp/* and srv/* roles into sys-stk/* and sys-svc/* namespaces

- Removed obsolete 'cmp' category, introduced 'stk' category (fa-bars-staggered icon).
- Renamed roles:
  * cmp-db-docker → sys-stk-back-stateful
  * cmp-docker-oauth2 → sys-stk-back-stateless
  * srv-domain-provision → sys-stk-front
  * cmp-db-docker-proxy → sys-stk-full-stateful
  * cmp-docker-proxy → sys-stk-full-stateless
  * cmp-rdbms → sys-svc-rdbms
- Updated all include_role references, vars, templates and README.md files.
- Adjusted run_once comments and variable paths accordingly.
- Updated all web-app roles to use new sys-stk/* and sys-svc/* roles.

Conversation: https://chatgpt.com/share/68b0ba66-09f8-800f-86fc-76c47009d431

roles/sys-stk-front/tasks/main.yml

@@ -0,0 +1,42 @@
+- block:
+  - name: Include dependency 'srv-proxy-core'
+    include_role:
+      name: srv-proxy-core
+    when: run_once_srv_proxy_core is not defined
+  - include_tasks: utils/run_once.yml
+  when: run_once_sys_stk_front is not defined
+
+- include_tasks: "01_cloudflare.yml"
+  when: DNS_PROVIDER == "cloudflare"
+
+- include_tasks: "{{ playbook_dir }}/tasks/utils/load_handlers.yml"
+  vars:
+    handler_role_name: "svc-prx-openresty"
+
+- name: "include role for {{ domain }} to receive certificates and do the modification routines"
+  include_role:
+    name: srv-composer
+
+- name: "Copy nginx config to {{ configuration_destination }}"
+  template:
+    src: "{{ vhost_template_src }}"
+    dest: "{{ configuration_destination }}"
+  register: nginx_conf
+  notify: restart openresty
+
+- block:
+  - name: "Check if {{ domains | get_domain(application_id) }} is reachable (only if config unchanged)"
+    uri:
+      url: "{{ domains | get_url(application_id, WEB_PROTOCOL) }}"
+    register: site_check
+    failed_when: false
+    changed_when: false
+
+  - name: Restart nginx if site is down
+    command:
+      cmd: "true"
+    notify: restart openresty
+    when:
+    - site_check.status is defined
+    - not site_check.status in [200,301,302]
+  when: not nginx_conf.changed