Vote state for users joining after reveal

[ajayreddy-8374]

• Handle voting state if someone joins the room after the voting is revealed. Currently we take null as vote for that user, decide how to handle this scenario and update the flow accordingly.

• Similarly if someone leaves the room and rejoins the room, the voting state is lost and user is considered as a new user. Same happens even if user refreshes the page. (Possible solution is to store the vote in local storage or somewhere for some time)

• if user joins room before voting is revealed i.e voting is still in progress he can vote without any issue