…bbles
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
### Summary by CodeRabbit
**Release Notes**
- New Feature: Enhanced WhatsApp integration with improved phone number
formatting and session ID generation.
- Refactor: Updated the `startWhatsAppPreview` and
`receiveMessagePreview` functions for better consistency and
readability.
- Bug Fix: Added a check for `phoneNumberId` in the `receiveMessage`
function to prevent errors when it's undefined.
- Documentation: Expanded the WhatsApp integration guide and FAQs in the
docs, providing more detailed instructions and addressing common
queries.
- Chore: Introduced a new `metadata` field in the
`whatsAppWebhookRequestBodySchema` to store the `phone_number_id`.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
f9a14c0685