Clickhouse language server: Error with comma

This works well:

<img width="292" height="158" alt="Image" src="https://github.com/user-attachments/assets/990d7cbc-762a-4698-9404-57571ffe1d99" />

However, this, which is valid Clickhouse syntax, gives an error:

<img width="309" height="154" alt="Image" src="https://github.com/user-attachments/assets/7558f89a-667e-4853-9fd9-63e7c9514b2c" />