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/lock-ops.mjs

@@ -8,7 +8,7 @@ import {
   KIND_APP_DATA,
   MS_PER_SECOND,
 } from './constants.mjs';
-import { nowUnix } from './utils.mjs';
+import { nowUnix, mergeRelayList } from './utils.mjs';
 import { defaultHealthManager, buildRelayHealthConfig, RelayHealthManager } from './relay-health-manager.mjs';
 import { publishLock, LockPublisher, secureRandom } from './lock-publisher.mjs';
 
@@ -69,10 +69,6 @@ function relayListLabel(relays) {
   return relays.join(', ');
 }
 
-function mergeRelayList(primaryRelays, fallbackRelays) {
-  return [...new Set([...primaryRelays, ...fallbackRelays])];
-}
-
 /**
  * Queries relays for active lock events matching the criteria.
  * Uses a tiered approach: tries primary relays first, then falls back to others if needed.

src/lock-publisher.mjs

@@ -6,6 +6,7 @@ import {
   getRelayFallbacks,
   getMinActiveRelayPool,
 } from './torch-config.mjs';
+import { mergeRelayList } from './utils.mjs';
 import { defaultHealthManager, buildRelayHealthConfig } from './relay-health-manager.mjs';
 
 function withTimeout(promise, timeoutMs, timeoutMessage) {
@@ -22,10 +23,6 @@ function relayListLabel(relays) {
   return relays.join(', ');
 }
 
-function mergeRelayList(primaryRelays, fallbackRelays) {
-  return [...new Set([...primaryRelays, ...fallbackRelays])];
-}
-
 const PUBLISH_ERROR_CODES = {
   TIMEOUT: 'publish_timeout',
   DNS: 'dns_resolution',

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 });