You are designing a Dataverse solution for a conference-management app. During each event, the app writes millions of short-lived attendee session-scan records within a few hours, with unpredictable write bursts. The records are queried mainly by a single session key, require no complex relational joins or roll-up columns, and are purged shortly after each event. You must minimize write throttling during spikes and control storage cost. Which table type should you use?