feat: POC — gitea-pages report publish + commit status

- ci-engine.yml: 2 dummy test stepiä + agnostinen publish-stage
  (skannaa .meta-tiedostot, PATCH raportit, postaa status + linkki)
- publish-git-pages.sh: palauta BASE URL (ilman index.html)
- .meta-formaatti: lisää context, description, state kentät

git-pages/values.yaml

@@ -43,13 +43,16 @@ publishAuth:
   htpasswdUsers: ""
 
 retention:
+  enabled: false
+  mode: sidecar
   schedule: "0 3 * * *"
   image:
-    repository: bitnami/kubectl
-    tag: "1.31.4"
+    repository: debian
+    tag: bookworm-slim
     pullPolicy: IfNotPresent
+  giteaApiUrl: ""
   rules:
-    default:
-      maxAgeDays: 90
-      keepMin: 5
-    branches: {}
+    branches:
+      default:
+        maxAgeDays: 90
+        keepMin: 5