fix(infra): replace legacy klz fallback references with etib across docker compose and test scripts

scripts/check-locale.ts

@@ -12,7 +12,8 @@ import * as cheerio from 'cheerio';
  */
 
 const targetUrl = process.argv[2] || process.env.NEXT_PUBLIC_BASE_URL || 'http://localhost:3000';
-const gatekeeperPassword = process.env.GATEKEEPER_PASSWORD || 'klz2026';
+const gatekeeperPassword = process.env.GATEKEEPER_PASSWORD || 'etib2026';
+const authCookieName = process.env.AUTH_COOKIE_NAME || 'etib_gatekeeper_session';
 
 // Expected slug translations: German key → English value
 const SLUG_MAP: Record<string, string> = {
@@ -32,7 +33,8 @@ const REVERSE_SLUG_MAP: Record<string, string> = Object.fromEntries(
   Object.entries(SLUG_MAP).map(([de, en]) => [en, de]),
 );
 
-const headers = { Cookie: `klz_gatekeeper_session=${gatekeeperPassword}` };
+const headers = { Cookie: `${authCookieName}=${gatekeeperPassword}` };
+
 
 function getExpectedTranslation(
   sourcePath: string,