message: Changed performance.now() to Date.now() for unix timestamps
diff: @@ -921,7 +921,7 @@ export class ContainerRuntime extends TypedEventEmitter<IContainerRuntimeEvents>
  } else {
  this.createContainerMetadata = {
  createContainerRuntimeVersion: pkgVersion,
  - createContainerTimestamp: performance.now(),
  + createContainerTimestamp: Date.now(),
  };
  }
  @@ -944,7 +944,7 @@ export class ContainerRuntime extends TypedEventEmitter<IContainerRuntimeEvents>
  * of this client's connection - https://github.com/microsoft/FluidFramework/issues/8375.
  */
  const getCurrentTimestamp = () => {
  - return this.deltaManager.lastMessage?.timestamp ?? performance.now();
  + return this.deltaManager.lastMessage?.timestamp ?? Date.now();
  };
  this.garbageCollector = GarbageCollector.create(
  this,
  