fix: make client installation observable

test/portable-node-bootstrap.test.ts

@@ -20,6 +20,7 @@ test("POSIX bootstrap installs a private Node and falls back after a network fai
     const result = runPosixFixture(fixture, "fallback");
     assert.equal(result.status, 0, result.stderr);
     assert.deepEqual(JSON.parse(result.stdout.trim()), { ok: true, status: "installed", managedNode: true });
+    assert.match(result.stderr, /\[dingtalk-approval\] 1\/4[\s\S]*2\/4[\s\S]*3\/4[\s\S]*4\/4/);
     assert.equal(existsSync(join(fixture.clientRoot, "node", RUNTIME_NAME, "bin", "node")), true);
     const calls = readFileSync(fixture.callLog, "utf8").trim().split(/\r?\n/);
     assert.deepEqual(calls.slice(0, 2), [