flowchart TD
    Client[External HTTPS Client] -->|HTTPS POST /events| CloudRun[Google Cloud Run Service]
    CloudRun -->|Publish Event| PubSubTopic[Cloud Pub/Sub Topic]
    CloudRun -->|Write Raw Payload| GCSAudit[Cloud Storage Audit Bucket]
    PubSubTopic -->|Push Delivery| EventConsumer[Cloud Run Consumer Service]
    EventConsumer -->|Acknowledge| PubSubTopic