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

scripts/publish-git-pages.sh

@@ -34,7 +34,7 @@ cp -a "$REPORT_DIR/." "$WORK/${OWNER}/${REPO}/reports/${SHA8}/"
 cat > "$WORK/${OWNER}/${REPO}/reports/${SHA8}/.meta" <<EOF
 {"branch":"${GITHUB_REF_NAME:-}","sha":"${GITHUB_SHA}","published_at":"$(date -u +%Y-%m-%dT%H:%M:%SZ)"}
 EOF
-tar -cf "$TAR" -C "$WORK" "$OWNER"
+find "$WORK/$OWNER" \( -type f -o -type l \) -print | sed "s|^${WORK}/||" | tar -cf "$TAR" -C "$WORK" -T -
 
 publish() {
   local method="$1"