Function with_writer_statement_limits 

pub fn with_writer_statement_limits<T>(
    conn: &Connection,
    time_budget: Duration,
    vm_budget: u64,
    run: impl FnOnce() -> T,
) -> Result<T, StatementRunError>

Run one public writer statement under caller-supplied limits. Exposed for deterministic boundary tests; production hosts normally use with_writer_statement_budget.