post
https://example.com/public-api/v1/phone_call_legs/list
Searchable list of call-detail records, one row per call leg.
Use POST /phone_calls/list for the grouped parent-call view. Filter and
paginate with first, offset, and after; continue with the
previous page_info.end_cursor. count is a top-level response field
and is populated only when include_count=true.