feat: add one-paste node onboarding (#122499)

* feat(pairing): add short join onboarding

* fix(gateway): isolate device join routing tests

docs/cli/node.md

@@ -70,6 +70,10 @@ Disable it on the node if needed:
 
 ## Run (foreground)
 
+For one-paste onboarding, use [`openclaw connect`](/cli/connect). It accepts a
+single-use join URL or the same setup code forms as `--pair`, then runs this
+node-host runtime.
+
 ```bash
 openclaw node run --host <gateway-host> --port 18789
 ```
@@ -281,4 +285,5 @@ created are rejected instead of changing what the node executes.
 ## Related
 
 - [CLI reference](/cli)
+- [Connect a machine](/cli/connect)
 - [Nodes](/nodes)