Function forward_event 

async fn forward_event(socket: &mut WebSocket, event: Value) -> bool

Forward a queued event-bus value to the WebSocket. Returns true if the send failed (the caller should break the loop).

Two shapes arrive: already-RPC-wrapped values (from the MPS broker via EventBusBridge) are forwarded as-is; raw event-bus values (e.g. SetMeta’s waveobj:update) are wrapped as an RPC eventrecv so the frontend WshRouter routes them to handleMuxEvent → updateMuxObject. Shared by both the priority and background egress lanes.