message: Fall back to defaults in case that scribe document metadata does not exist (back compat)
diff: @@ -63,7 +63,8 @@ export class ScribeLambda extends SequencedLambda {
  ) {
  super(context);
  - this.lastOffset = document.scribe.logOffset;
  + // For back compat with pre-scribe documents we need to check for the scribe metadata
  + this.lastOffset = document.scribe ? document.scribe.logOffset : 0;
  this.pendingMessages.push(...messages.map((message) => message.operation));
  }
  