Returns the customer's inbound call detail records (CDRs) — calls received on the customer's DID numbers — newest first. Without time_range the last 24 hours are returned. Results can be narrowed to one or more DID numbers with did; numbers that do not belong to the customer are ignored. Pagination is by page and per_page (default 100, max 1000); keep requesting the next page until an empty call_records array is returned, which signals end-of-data.