HALOZER WhatsApp Web Service v36.1 - reconciled

Deployment target: wa.manage.halozer.in (cPanel Node.js app at subdomain root)

IMPORTANT:
- Do NOT delete .wwebjs_auth. It stores the persistent WhatsApp LocalAuth session.
- Keep the old manage.halozer.in/whatsapp_service Node app STOPPED.
- This version does NOT auto-retry WhatsApp initialization, to avoid process/restart storms.
- ERP config is resolved from ../manage.halozer.in/config.php for the sibling subdomain layout.
- If the hosting setup differs, set ERP_CONFIG_PATH in the Node app environment.

After replacing server.js/package.json, run NPM Install once, then start the app.
Check /health before attempting QR scanning.
