Refactor: consolidate mergeRelayList into utils.mjs

- Moved `mergeRelayList` from `src/lock-ops.mjs` and `src/lock-publisher.mjs` to `src/utils.mjs`.
- Updated imports in `src/lock-ops.mjs` and `src/lock-publisher.mjs`.
- Added unit tests for `mergeRelayList` in `test/utils.test.mjs`.
- Restored `torch-config-test.json` which was deleted by the test suite.

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

src/utils.mjs

@@ -42,6 +42,10 @@ export function detectPlatform() {
   return null;
 }
 
+export function mergeRelayList(primaryRelays, fallbackRelays) {
+  return [...new Set([...primaryRelays, ...fallbackRelays])];
+}
+
 export function ensureDir(dir) {
   if (!fs.existsSync(dir)) {
     fs.mkdirSync(dir, { recursive: true });