fix: whatsapp archive lthash mismatch and UI history refresh

[asemarafa]

This PR addresses the issue where WhatsApp chats fail to sync their archive/unarchive state properly when modified from another device (e.g.,
a phone) while nchat is offline or disconnected.

What this fixes:

1. ErrMismatchingLTHash in whatsmeow: When the local app state hash does not match the server's hash, whatsmeow previously failed silently on
   ErrMismatchingLTHash. This patch catches the error and explicitly sends a BuildAppStateRecoveryRequest to heal the local state.

2. UI History Refresh (uimodel.cpp): When a chat is unarchived, the application sends a request for new messages. However, prior message
   requests might have been silently dropped by the NewMessagesNotify handler when the chat was still considered archived locally. This
   clears any previously requested message IDs and calls UpdateHistory() to ensure the UI accurately reflects any messages that arrived while
   the chat was archived.

[d99kris]

Hi @asemarafa - thanks for contributing again. 👍
Ideally I try to minimize code changes in third-party libs, like whatsmeow, but I will review the changes and see how we can proceed. Sometimes it's preferred to contribute them upstream instead.

[d99kris]

Hi again - I think the uimodel.cpp change makes sense, but I am a little hesitant regarding the change in whatsmeow/appstate.go. While it seems like a valid recovery method, my concern is that I have not found other whatsapp libraries doing it, and there is a potential risk of triggering possibly a large number of BuildAppStateRecoveryRequest, so we may need some throttling, or at least not perform it more than once per name, to ensure we don't exhibit some "bad client behavior" that the service may use to block users for.

Ideally I'd prefer this part of the PR to be submitted upstreams as a PR to https://github.com/tulir/whatsmeow as they may have better knowledge in assessing the correctness of the fix. And then nchat can integrate the fix once it's accepted upstream. We update the bundled whatsmeow once or twice per month. As you can see in lib/wmchat/go/ext/nchat-whatsmeow.patch the nchat deviations from upstream are quite small.