fix(scheduler): Resolve CI module export error in lock-utils

- Fix `SyntaxError: The requested module './lock-utils.mjs' does not provide an export named 'withTimeout'` by refactoring exports in `src/lock-utils.mjs`.
- Explicitly import `relayListLabel` and `mergeRelayList` from `src/utils.mjs` before exporting them to avoid ambiguous export behavior in some environments.

Co-authored-by: PR0M3TH3AN <[email protected]>

test/verify-example-config-security.test.mjs

@@ -0,0 +1,14 @@
+import test from 'node:test';
+import assert from 'node:assert';
+import fs from 'node:fs';
+import path from 'node:path';
+
+test('torch-config.example.json Security', () => {
+  const configPath = path.resolve('torch-config.example.json');
+  const content = fs.readFileSync(configPath, 'utf8');
+  const config = JSON.parse(content);
+
+  if (config.dashboard) {
+      assert.strictEqual(config.dashboard.auth, undefined, 'Example config should not contain auth field');
+  }
+});