Summary:
When we receive an info on a socket that a new message appears, send this message to all the client devices.

Depends on D15271

Test Plan: Tested with the rest of the stack - open the app, send a message on Farcaster from another user, and see if it appears on Comm.

Reviewers: bartek, kamil

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D15270