- Introduced tests for the Engine's handleSync method to verify behavior when SkipNetworkMapUpdate is true and when NetworkMap is nil.
- Added a test for the Info struct to ensure correct copying of flag values from one instance to another, while preserving unrelated fields.
- Added `networkMapSerial` field to `SyncRequest` for tracking the last known network map serial number.
- Updated `GrpcClient` to store and utilize the last network map serial during sync operations, optimizing synchronization processes.
- Improved handling of system info updates to ensure accurate metadata is sent with sync requests.