[feat] Support RFC3339 compliant time zone formatting when logging time fields #1150
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This PR adds a new time formatting directive for log record timestamps, namely the GNU
dateextension%:z. This directive will print the time zone difference in fully RFC3339 compliant way, i.e.,+/-HH:MMinstead or+/-HHMM, which%zprints.This PR also replaces how
Job's completion time is stored and retrieved, also inside the Slurm backend. We usetime.time()to retrieve the time in seconds from the Epoch instead ofdatetime.now(), becausedatetimedoes not store time zone information. Also all backends are now required to provide the completion time in seconds from the Epoch, so Slurm backend was modified accordingly.Fixes #1061.
@brandongc FYI