IP not logged for connected actions

While there's rudimentary IP logging, there's no way to differentiate the actions of multiple simultaneously connected clients in the logs. We should figure out a way to log the IP along with the remote repo ID (or something similar) so that we can reconstruct a history for debugging.

Start by locating the existing rudimentary IP logging and the code handling simultaneously connected clients in the sync server. Determine how a remote repo ID or similar identifier can be logged with each IP, then verify that the resulting logs can reconstruct actions for debugging.

Written by the indexing model from the issue text.