Incorrect timestamp formatting in JSON response from /query Endpoint

[nikrooz]

Given that the timestamps are in UTC format, I anticipate a trailing Z:

FYI, there was a similar issue in arrow-json apache/arrow-rs#3449 but it has been resolved for some time now.

[nikrooz]

CC @jackkleeman @slinkydeveloper

[jackkleeman]

fn write_timestamp(
    f: &mut dyn Write,
    naive: NaiveDateTime,
    timezone: Option<Tz>,
    format: Option<&str>,
) -> FormatResult {
    match timezone {
        Some(tz) => {
            let date = Utc.from_utc_datetime(&naive).with_timezone(&tz);
            match format {
                Some(s) => write!(f, "{}", date.format(s))?,
                None => write!(f, "{}", date.to_rfc3339_opts(SecondsFormat::AutoSi, true))?,
            }
        }
        None => match format {
            Some(s) => write!(f, "{}", naive.format(s))?,
            None => write!(f, "{naive:?}")?,
        },
    }
    Ok(())
}

Heres the underlying function. I believe format will be none, so it would use the rfc3339 if it has a timezone, or otherwise it uses the default Debug impl for NaiveDateTime, which goes like 2015-06-30T23:59:60.500

The problem here is that the timestamp data itself is non timezoned. I will see if this is easily fixable