message: set initial msn in deli lambda
diff: @@ -34,7 +34,7 @@ export class DeliLambda implements IPartitionLambda {
  // Client sequence number mapping
  private clientNodeMap: { [key: string]: utils.IHeapNode<IClientSequenceNumber> } = {};
  private clientSeqNumbers = new utils.Heap<IClientSequenceNumber>(SequenceNumberComparer);
  - private minimumSequenceNumber;
  + private minimumSequenceNumber = -1;
  private window: RangeTracker;
  private branchMap: RangeTracker;
  private checkpointContext: CheckpointContext;
  @@ -185,7 +185,9 @@ export class DeliLambda implements IPartitionLambda {
  } else {
  if (message.clientId) {
  // We checked earlier for the below case
  - assert(message.operation.referenceSequenceNumber >= this.minimumSequenceNumber);
  + assert(
  + message.operation.referenceSequenceNumber >= this.minimumSequenceNumber,
  + `${message.operation.referenceSequenceNumber} >= ${this.minimumSequenceNumber}`);
  this.upsertClient(
  message.clientId,
  