fix: correct require paths for dist/src output + systemd user

- worker.main.ts: require('../../package.json') for dist/src/ location
- worker-heartbeat.service.ts: require('../../../package.json') + try/catch
- systemd units: User=ubuntu (www-data not present on production)
- EnvironmentFile: /opt/zhixi/env/.env.production

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

deploy/zhixi-nest-api.service

@@ -5,8 +5,8 @@ Wants=mysql.service redis.service
 
 [Service]
 Type=simple
-User=www-data
-Group=www-data
+User=ubuntu
+Group=ubuntu
 WorkingDirectory=/opt/zhixi/api-server
 ExecStart=/usr/bin/node dist/src/main.js
 Restart=always

deploy/zhixi-nest-worker.service

@@ -7,8 +7,8 @@ After=zhixi-nest-api.service
 
 [Service]
 Type=simple
-User=www-data
-Group=www-data
+User=ubuntu
+Group=ubuntu
 WorkingDirectory=/opt/zhixi/backend
 ExecStart=/usr/bin/node dist/src/worker.main.js
 Restart=always

src/worker.main.ts

@@ -57,7 +57,7 @@ async function bootstrap() {
   const logger = new Logger('WorkerBootstrap');
 
   // eslint-disable-next-line @typescript-eslint/no-var-requires
-  const pkg = require('../package.json');
+  const pkg = (() => { try { return require('../../package.json'); } catch { return { version: '0.0.0' }; } })();
   const instanceId = generateInstanceId();
   process.env.WORKER_INSTANCE_ID = instanceId;
   logger.log(`Worker version ${pkg.version} — instance ${instanceId}`);

src/workers/worker-heartbeat.service.ts

@@ -120,7 +120,7 @@ export class WorkerHeartbeatService implements OnModuleInit, OnModuleDestroy {
     const data: WorkerHeartbeatData = {
       instanceId,
       // eslint-disable-next-line @typescript-eslint/no-var-requires
-      appVersion: require('../../package.json').version,
+      appVersion: (() => { try { return require('../../../package.json').version; } catch { return '0.0.0'; } })(),
       startedAt: this.startedAt.toISOString(),
       queues: Object.keys(QUEUE_DEFINITIONS),
       concurrency: Object.values(QUEUE_DEFINITIONS)[0]?.workerOptions.concurrency ?? 1,