Timestamp formatting in results

[gassc]

The ISO formatting isn't Excel-friendly. Return results with something that is human readable and a standard.

[gassc]

Currently, timestamps (including timezone offset) are returned using the RFC 3339 standard (ISO-8061 format). Excel doesn't automatically parse this out, requiring an extra step for end-users of the CSV download. We can return a spec that Excel will automatically parse.

Not sure what downstream is expecting ISO-8061 formattted datetimes. Need to investigate first.