PLT-5750 Add sequence number to websocket connections and events (#5907)

* Add sequence number to websocket connections and events

* Copy pointer instead of pass by value and use int64 over uint64

* Add more logging to missed events

app/websocket_router.go

@@ -61,7 +61,6 @@ func (wr *WebSocketRouter) ServeWebSocket(conn *WebConn, r *model.WebSocketReque
 			HubRegister(conn)
 
 			resp := model.NewWebSocketResponse(model.STATUS_OK, r.Seq, nil)
-			resp.DoPreComputeJson()
 			conn.Send <- resp
 		}
 
@@ -91,7 +90,6 @@ func ReturnWebSocketError(conn *WebConn, r *model.WebSocketRequest, err *model.A
 
 	err.DetailedError = ""
 	errorResp := model.NewWebSocketError(r.Seq, err)
-	errorResp.DoPreComputeJson()
 
 	conn.Send <- errorResp
 }