Function sql_txn_output_json 

pub fn sql_txn_output_json(out: &SqlTxnOutput) -> Value

The /execute-sql-txn output shape — the one-shot AND session-commit reply, from either master: applied, the backend’s opaque txn identity (rindled: cv + txId; replicator: cursor; OMITTED when nothing committed), and the client watermark (lmidAdvances + flat lmid).