fix(cluster): avoid hostname lookup during construction

ts/cluster/cluster-manager.ts

@@ -1,4 +1,3 @@
-import os from 'node:os';
 import * as fs from 'node:fs/promises';
 import type { IModelCatalogEntry } from '../interfaces/catalog.ts';
 import type {
@@ -16,7 +15,7 @@ import { CLUSTER, PATHS } from '../constants.ts';
 export class ClusterManager {
   private config: IClusterConfig = {
     enabled: false,
-    nodeName: os.hostname(),
+    nodeName: 'modelgrid-local',
     role: 'standalone',
     bindHost: CLUSTER.DEFAULT_BIND_HOST,
     gossipPort: CLUSTER.DEFAULT_GOSSIP_PORT,