Outbox Pattern for Event Dispatch

Module

Scanner

VERIFIED

Outbox pattern for reliable event dispatch with idempotent processing, dispatch tracking, and retry logic.

Event Dispatcher:
- src/Scanner/StellaOps.Scanner.WebService/Services/IReportEventDispatcher.cs - IReportEventDispatcher interface for reliable event dispatch with idempotent processing
- src/Scanner/StellaOps.Scanner.WebService/Services/ReportEventDispatcher.cs - ReportEventDispatcher implements the outbox pattern for reliable event dispatch with dispatch tracking and retry logic
OCI Attestation Publisher:
- src/Scanner/StellaOps.Scanner.WebService/Services/IOciAttestationPublisher.cs - IOciAttestationPublisher interface for publishing attestation events to OCI registries
Report Endpoints:
- src/Scanner/StellaOps.Scanner.WebService/Endpoints/ReportEndpoints.cs - ReportEndpoints triggers event dispatch for completed scan reports

Complete a scan and verify the report event dispatcher reliably publishes scan completion events
Simulate a transient failure during event dispatch and verify the retry logic reprocesses the event
Verify idempotent processing ensures duplicate events are not dispatched for the same scan
Verify dispatch tracking records the status of each dispatched event (pending, dispatched, failed)
Verify the outbox pattern guarantees at-least-once delivery for scan report events