Bulk Transaction Handler

Backend infrastructure component that executes the atomic database transaction, creating one activity record per selected participant within a single transaction boundary. Guarantees all-or-nothing semantics — any insert failure triggers a full rollback of the entire batch. Writes a labeled bulk operation entry to the audit log on both success and failure, ensuring bulk actions are clearly identifiable in the activity feed.

Feature: Bulk Registration

bulk-transaction-handler

• Execute database transaction inserting one activity row per participant atomically
• Roll back the entire batch on any single insert failure to prevent partial state
• Write labeled bulk operation summary to the audit log
• Validate that all participant IDs belong to the coordinator's association before insert