Composite Salesforce sync

Atomic multi-object sync to Salesforce — donor, donation, opportunity, and soft credits all created in a single transaction using the Composite API. Either everything succeeds or nothing does, so you never end up with orphaned records, half-synced gifts, or confusing partial states. Critical for organizations doing major gift work where soft credits, attribution, and household giving have to stay in sync. Replaces the most fragile part of any Salesforce integration.