.NET: [Bug]: The FileSystemJsonCheckpointStore did not save the "index.jsonl" file.

[helloxubo]

Description

Hello, when CheckpointManager uses FileSystemJsonCheckpointStore, the index.jsonl file will not be automatically saved.
In the CreateCheckpointAsync method, should we force a Flush operation after each write to the index?

Code Sample

const string CheckpointPath = "checkpoints";
        var checkpointManager = CheckpointManager.CreateJson(new FileSystemJsonCheckpointStore(new DirectoryInfo(CheckpointPath)));

Error Messages / Stack Traces

Package Versions

1.0.0

.NET Version

.Net 10

Additional Context

No response