Issue #3342486 by aaronbauman: "Periodic update" mechanism takes too long and kills cron

Creates a queue worker to delegate individual user processing to system queue, in order to prevent long processing (large user database) from killing the entire cron run.

Closes #3342486

added 1 commit

• a601de20 - Issue #3342486 by aaronbauman: "Periodic update" mechanism takes too long and kills cron

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