v8.5.0

## What's New in v8.5.0

🚀 **Minor Release: Contact Webhooks, Chat History for Contact Messages & Newsletter Subscriber Counts**

This release enriches the contact webhook payload with a structured `phone_number` field, persists incoming contact messages into chat history, and fixes newsletter subscriber counts that were missing from the subscribed-list response.

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## ✨ New Features

### Structured `phone_number` on Contact Webhooks (#656)
- Contact webhook payloads now include a structured `phone_number` field for both single contacts and multi-contact shares
- Original `vcard` field is preserved for backward compatibility
- Chatwoot forwarding path updated to understand the structured payload

### Persist Incoming Contact Messages in Chat Storage (#654)
- Incoming `ContactMessage` events are now serialized into chat history instead of being dropped when the message has no text or media
- The phone number embedded in the vCard is preserved in stored content
- Added test coverage for `ContactMessage` parsing

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## 🐛 Bug Fixes

### Newsletter Subscriber Counts (#660)
- Enrich subscribed newsletter metadata with detail fetches so `subscribers_count` is populated when WhatsApp omits it from the subscribed-list response
- Base subscribed newsletter list remains the source of truth
- Falls back to the original newsletter metadata if a detail fetch fails
- Fixes #658

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## 🔧 Technical Improvements

### Code Modernization
- Remove dead code across the codebase
- Modernize `interface{}` to `any` for Go 1.18+ idiomatic style

### Dependency Updates
- `go.mau.fi/whatsmeow`: updated to latest (multiple passes)
- All Go dependencies kept up-to-date

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## What's Changed

- fix: enrich newsletter subscriber counts by @aldinokemal in https://github.com/aldinokemal/go-whatsapp-web-multidevice/pull/660
- Add phone number to contact webhook payload by @juliomuhlbauer in https://github.com/aldinokemal/go-whatsapp-web-multidevice/pull/656
- Persist incoming contact messages in chatstorage by @juliomuhlbauer in https://github.com/aldinokemal/go-whatsapp-web-multidevice/pull/654
- chore: remove dead code and modernize interface{} to any by @aldinokemal
- chore: update whatsmeow to latest by @aldinokemal

## New Contributors

- @juliomuhlbauer made their first contribution in https://github.com/aldinokemal/go-whatsapp-web-multidevice/pull/656

**Full Changelog**: https://github.com/aldinokemal/go-whatsapp-web-multidevice/compare/v8.4.0...v8.5.0