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]>

test/utils.test.mjs

@@ -2,7 +2,7 @@ import { describe, it, after } from 'node:test';
 import assert from 'node:assert';
 import fs from 'node:fs';
 import path from 'node:path';
-import { getIsoWeekStr, todayDateStr, nowUnix, ensureDir, detectPlatform } from '../src/utils.mjs';
+import { getIsoWeekStr, todayDateStr, nowUnix, ensureDir, detectPlatform, mergeRelayList } from '../src/utils.mjs';
 
 describe('Date Utilities', () => {
   describe('todayDateStr', () => {
@@ -59,6 +59,23 @@ describe('Date Utilities', () => {
   });
 });
 
+describe('Relay Utilities', () => {
+  describe('mergeRelayList', () => {
+    it('merges two lists of relays without duplicates', () => {
+      const primary = ['wss://relay1.com', 'wss://relay2.com'];
+      const fallback = ['wss://relay2.com', 'wss://relay3.com'];
+      const merged = mergeRelayList(primary, fallback);
+      assert.deepStrictEqual(merged, ['wss://relay1.com', 'wss://relay2.com', 'wss://relay3.com']);
+    });
+
+    it('handles empty lists', () => {
+      assert.deepStrictEqual(mergeRelayList([], []), []);
+      assert.deepStrictEqual(mergeRelayList(['wss://relay1.com'], []), ['wss://relay1.com']);
+      assert.deepStrictEqual(mergeRelayList([], ['wss://relay1.com']), ['wss://relay1.com']);
+    });
+  });
+});
+
 describe('Platform Utilities', () => {
   describe('detectPlatform', () => {
     const originalEnv = { ...process.env };