fix(git-hangman-lab): publish-package - handle cross-owner repo link gracefully

The link step now:
1. Extracts the actual repo owner from the git remote URL
2. Captures HTTP response status and body
3. Shows a clear warning when the repo belongs to a different owner
  (requires site admin or matching owner), instead of silently failing

git-hangman-lab/scripts/publish-package

@@ -88,9 +88,29 @@ do_docker() {
   # Link package to repository
   TOKEN=$(secret-mgr get-secret --key git-access-token 2>/dev/null || secret-mgr get-secret --key git)
   REPO_NAME=$(basename "$REPO")
-  curl -s -X POST \
+
+  # Determine the actual owner of the git repository
+  REPO_OWNER="$OWNER"
+  if [[ -d "$REPO/.git" ]]; then
+    REMOTE_URL=$(git -C "$REPO" remote get-url origin 2>/dev/null || true)
+    if [[ "$REMOTE_URL" =~ git\.hangman-lab\.top/([^/]+)/ ]]; then
+      REPO_OWNER="${BASH_REMATCH[1]}"
+    fi
+  fi
+
+  LINK_RESP=$(curl -s -w "%{http_code}" -X POST \
     -H "Authorization: token $TOKEN" \
-    "https://git.hangman-lab.top/api/v1/packages/${OWNER}/container/${IMAGE}/-/link/${REPO_NAME}" || true
+    "https://git.hangman-lab.top/api/v1/packages/${OWNER}/container/${IMAGE}/-/link/${REPO_NAME}")
+  LINK_STATUS="${LINK_RESP: -3}"
+  LINK_BODY="${LINK_RESP:0:-3}"
+
+  if [[ "$LINK_STATUS" != "200" && "$LINK_STATUS" != "201" ]]; then
+    if echo "$LINK_BODY" | grep -q '"message".*repository does not exist'; then
+      echo "Warning: repository '$REPO_NAME' is not owned by '$OWNER' — skipping link (requires site admin or matching owner)."
+    else
+      echo "Warning: package link failed (HTTP $LINK_STATUS): $LINK_BODY"
+    fi
+  fi
 
   lock-mgr release "$LOCKFILE" "$KEY"
   echo "Done: $FULL_IMAGE"