Brazilian mobile numbers transitioned from 8 to 9 digits around 2012-2016.
WhatsApp accounts created before the migration may still be registered
with the old 8-digit format internally, causing silent message delivery
failures.
This fix:
- Adds brazil-jid.ts resolver that detects BR mobile numbers
- Uses sock.onWhatsApp() to query which format is actually registered
- Caches results for 7 days to avoid repeated lookups
- Modifies monitor.ts to pass onWhatsApp to createWebSendApi
- Falls back gracefully if onWhatsApp is not available
Tested: Successfully resolved +5511999998888 → 551199998888@s.whatsapp.netFixes#4168
