test: dockerized test suite (openldap + redis + test-runner)

docker-compose.test.yml spins up the all-in-one OpenLDAP image, a
standalone Redis, and a test-runner that seeds the test user and runs
jest against them. globalSetup honors REDIS_URL; tests/setup.js
initializes the ORM and flushes test Redis keys before the run.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

nodejs/tests/globalSetup.js

@@ -5,7 +5,8 @@
 const { createClient } = require('redis');
 
 module.exports = async function() {
-	const client = createClient();
+	const redisUrl = process.env.REDIS_URL || undefined;
+	const client = createClient(redisUrl ? { url: redisUrl } : {});
 	await client.connect();
 
 	const keys = await client.keys('sso_manager_test_*');