- Introduced `SseSubscribeClient` to connect to the external web server and process events via SSE (Server-Sent Events).
- Added `WebHandler` interface for type-safe event deserialization and processing.
- Included `WebChatHandler` to handle incoming web chat messages and forward them to the chat system.
- Updated `Config` for new configurable values: `CHAT_WEB_REGISTER_TO_BASE_URL` and `CHAT_WEB_TOKEN`.