Supports both modes of redis server deployment: 1.

NewUnaryAPI creates a new UnaryAPI for request-reply over Redis.

SendMessage sends the message over Redis.

Subscribe shall be done before the code that will trigger the message being sent.

for redis running in a cloudlet.

Special IDs in the streams API.

MessageHandler is used to wait for a specific message.

UnaryAPI allows for request-reply over Redis.

GetRequestBuf should return an empty Message of the expected underlying type to unmarshal the message data into.

RequestHandler shall handle the request and return the reply.