fix(cli): wait for process exit before restarting gateway on Windows (openclaw#27913) thanks @tda1017

Verified:
- pnpm vitest src/cli/update-cli/restart-helper.test.ts
- pnpm check
- pnpm build

Co-authored-by: tda1017 <95275462+tda1017@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/cli/update-cli/update-command.ts

@@ -818,11 +818,15 @@ export async function updateCommand(opts: UpdateCommandOptions): Promise<void> {
 
   let restartScriptPath: string | null = null;
   let refreshGatewayServiceEnv = false;
+  const gatewayPort = resolveGatewayPort(
+    configSnapshot.valid ? configSnapshot.config : undefined,
+    process.env,
+  );
   if (shouldRestart) {
     try {
       const loaded = await resolveGatewayService().isLoaded({ env: process.env });
       if (loaded) {
-        restartScriptPath = await prepareRestartScript(process.env);
+        restartScriptPath = await prepareRestartScript(process.env, gatewayPort);
         refreshGatewayServiceEnv = true;
       }
     } catch {
@@ -903,7 +907,7 @@ export async function updateCommand(opts: UpdateCommandOptions): Promise<void> {
     result,
     opts,
     refreshServiceEnv: refreshGatewayServiceEnv,
-    gatewayPort: resolveGatewayPort(configSnapshot.valid ? configSnapshot.config : undefined),
+    gatewayPort,
     restartScriptPath,
   });