ReplicaDecoder mirrors Entity::WriteBaseReplicaData and each component's Serialize, keeps what each network ID is
per world instance, and shows the rest as bits when no layout fits. CaptureTool links the game: game messages are
decoded (and compared in replays), and decode --cdserver reads replica packets.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>