feat(ai): introduce dedicated AI roles and wiring; clean up legacy AI stack

• Add svc-ai category under roles and load it in constructor stage

• Create new 'svc-ai-ollama' role (vars, tasks, compose, meta, README) and dedicated network

• Refactor former AI stack into separate app roles: web-app-flowise and web-app-openwebui

• Add web-app-minio role; adjust config (no central DB), meta (fa-database, run_after), compose networks include, volume key

• Provide user-focused READMEs for Flowise, OpenWebUI, MinIO, Ollama

• Networks: add subnets for web-app-openwebui, web-app-flowise, web-app-minio; rename web-app-ai → svc-ai-ollama

• Ports: rename ai_* keys to web-app-openwebui / web-app-flowise; keep minio_api/minio_console

• Add group_vars/all/17_ai.yml (OLLAMA_BASE_LOCAL_URL, OLLAMA_LOCAL_ENABLED)

• Replace hardcoded include paths with path_join in multiple roles (svc-db-postgres, sys-service, sys-stk-front-proxy, sys-stk-full-stateful, sys-svc-webserver, web-svc-cdn, web-app-keycloak)

• Remove obsolete web-app-ai templates/vars/env; split Flowise into its own role

• Minor config cleanups (CSP flags to {}, central_database=false)

https://chatgpt.com/share/68d15cb8-cf18-800f-b853-78962f751f81

roles/web-app-minio/tasks/main.yml

@@ -1,4 +1,13 @@
 ---
+- name: "Install Ollama Dependency"
+  include_role:
+    name: svc-ai-ollama
+  vars:
+    flush_handlers: true
+  when:    
+    - run_once_svc_ai_ollama is not defined
+    - OLLAMA_LOCAL_ENABLED | bool
+
 - name: "load docker and db for {{ application_id }}"
   include_role:
     name: sys-stk-back-stateless