Publish verified Ubuntu 24.04 headless preview and user setup guide

docs/ROADMAP.md

@@ -11,6 +11,10 @@ release. Keep their evidence and unchecked production gates intact.
 - [x] Publish Windows desktop v0.1.1 with single-instance handling; verify public
   bytes and isolated genuine Google CPU launch. Existing user installation is
   not automatically upgraded. See [release evidence](WINDOWS-0.1.1.md).
+- [x] Publish the Linux x86-64 headless preview with current query-role runtime,
+  verified public bytes and genuine document/code/audio CPU archive checks on
+  Ubuntu 24.04 WSL. See [headless evidence](LINUX-HEADLESS.md); desktop, GPU and
+  broader distribution compatibility remain open.
 
 ## Required product scope (user clarification)