Make Card Creation More Atomic

[adhil0]

Right now, there is an issue where, for a variety of reasons, (Jira cuts off our card creation task, card cache isn't updated when task kicks off) duplicate cards are created on our Jira board. To fix this, we can make our card creation more atomic.

One way to do that would be to call the create_cards() function for each case individually, rather than all of them at once. Or we could create all of them at once, but also refresh the card cache after each one, so that if the task stops, those cards won't be recreated.