feat(core-testing): RecordingAuditLog test double

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-testing/src/instrumentation/index.ts

@@ -4,3 +4,4 @@ export { RecordingMetrics, type RecordedMetric } from "./recording-metrics";
 export { RecordingJobQueue } from "./recording-job-queue";
 export { RecordingEventBus } from "./recording-event-bus";
 export { RecordingRealtimeBroadcaster } from "./recording-realtime-broadcaster";
+export { RecordingAuditLog } from "./recording-audit-log";