test(auth): give real Argon2id hashing a 30s test budget

The default 5s does not fit a chain of 11 hashes on a shared CI runner. The
production cost parameters are untouched.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

services/auth/vitest.config.ts

@@ -2,6 +2,10 @@ import { defineConfig } from "vitest/config";
 
 export default defineConfig({
   test: {
+    // Real Argon2id hashes cost 1-3s each on a shared CI runner, and several
+    // tests chain a dozen of them. The production cost parameters stay as they
+    // are; the default 5s budget is what does not fit.
+    testTimeout: 30_000,
     // session.ts refuses to load without a real signing secret, and ESM hoists
     // imports - so the value has to exist before any test file is evaluated,
     // which an assignment inside a test file cannot guarantee.