This crate has been moved to https://github.com/GothenburgBitFactory/taskchampion-sync-server. The integration-tests repo used the sync server to test integration between taskchampion and the sync-server. We should do that again, but after taskchampion moves to its own repo (#3209). In the interim, the cross-sync integration test can simply test syncing between local servers, but the snapshot test is no longer useful as the local server does not support snapshots.