fix(ci): update production deploy workflow for new heap limit and CRON_SECRET

- Remove redundant NODE_OPTIONS override (heap limit now in package.json)
- Add CRON_SECRET placeholder for pre-test build step

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/deploy-production.yml

@@ -150,6 +150,7 @@ jobs:
           PAYLOAD_PUBLIC_SERVER_URL: https://build.example.com
           CONSENT_LOGGING_API_KEY: ci-consent-api-key-placeholder
           IP_ANONYMIZATION_PEPPER: ci-anonymization-pepper-placeholder
+          CRON_SECRET: ci-cron-secret-placeholder
 
   # ===========================================================================
   # Database Backup (before deployment)
@@ -282,7 +283,7 @@ jobs:
             # Build
             echo ""
             echo "=== Building application ==="
-            NODE_OPTIONS="--max-old-space-size=2048" pnpm build
+            pnpm build
 
             # Restart services
             echo ""
@@ -348,7 +349,7 @@ jobs:
 
               pnpm install --frozen-lockfile
               pm2 stop payload 2>/dev/null || true
-              NODE_OPTIONS="--max-old-space-size=2048" pnpm build
+              pnpm build
               pm2 restart payload --update-env
               pm2 restart queue-worker --update-env