Relational DynamoDB: Advanced Patterns and Production Realities &#xA; In Part 1 , we covered the fundamental tradeoffs.&#xA;In Part 2 , we built&#xA;GitHub&rsquo;s backend. Now let&rsquo;s talk about what happens when you&rsquo;re running this in production. &#xA; These are the sharp edges that separate successful DynamoDB implementations from disasters. Hot&#xA;partitions that throttle your…