requestCheckpoint
Requests a checkpoint from the PowerSync service.
The returned request can be awaited (using CheckpointRequest.waitForSync) to confirm that the local database has applied server-side changes up to the checkpoint. This method requires an active or connecting sync client connected with SyncOptions.checkpointMode set to com.powersync.sync.CheckpointMode.Requests and PowerSync service version 1.24.0 or later.
It can throw for connection, mode, authentication, or service request failures.