List webhook endpoint deliveries

Delivery attempts for one webhook endpoint, newest first. One row per (endpoint, event, resource), updated in place across retries. Each row includes the exact request payload and signed headers Speechify sent (request_body, request_headers) and the response your server returned (last_status_code, last_response_body, last_response_headers), so you can verify the signature and debug failures. Cursor-paginated: omit cursor for the first page; walk pages while has_more is true (default page size 50, max 200).

An endpoint that was not a target of an event has no row for it: a project-scoped endpoint records nothing for another project's events. An empty list therefore means either nothing matched or nothing happened. To tell them apart, check the project's own activity first: activity there with no delivery here is a defect to report; none there means there was nothing to deliver.