SiYuan: Missing publish-access filter on getBlockAttrs and batchGetBlockAttrs discloses block attributes (name, alias, memo, custom fields) of protected documents

CVE: This vulnerability corresponds to CVE-2026-72803. Summary POST /api/attr/getBlockAttrs and POST /api/attr/batchGetBlockAttrs return a block's full attribute set IAL with no publish-access check. Both are CheckAuth-only, so they are reachable by the publish RoleReader token and by the anonymo...