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

group_vars/all/09_networks.yml

@@ -104,6 +104,12 @@ defaults_networks:
       subnet: 192.168.103.224/28
     web-app-xwiki:
       subnet: 192.168.103.240/28
+    web-app-openwebui:
+      subnet: 192.168.104.0/28
+    web-app-flowise:
+      subnet: 192.168.104.16/28
+    web-app-minio:
+      subnet: 192.168.104.32/28
 
     # /24 Networks / 254 Usable Clients
     web-app-bigbluebutton:
@@ -116,5 +122,5 @@ defaults_networks:
       subnet: 192.168.201.0/24
     svc-db-openldap:
       subnet: 192.168.202.0/24
-    web-app-ai:
+    svc-ai-ollama:
       subnet: 192.168.203.0/24 # Big network to bridge applications into ai