Get lead status change report

Get a lead status change report. The date range is optional. A report may be requested for a specific time period or overall. You can specify either a `query` or `smart_view_id` (but not both) to filter leads included in the report. The following fields are returned (when requesting an overall report, some inapplicable fields will not be returned): * `status_overview`: A list of all statuses with: * `status_id`, `status_label`, `status_is_deleted`: The ID and label of the status, and whether it was deleted. * `started`: Number of leads in this status at the start of the period. * `ended`: Number in this status at the end. * `change`: Net change during the period (`ended` minus `started`). * `change_percent`: Net change in percent. * `gained`: Number that were not in this status at the beginning but were at the end. * `lost`: Number that were in this status at the beginning but were not at the end. * `entered`: Number that entered this status at some point during the period. * `left`: Number that left this status at some point during the period. * `_queries`: A dictionary containing search queries for the different states (`started`, `ended`, `gained`, `lost`, `entered`, `left`). * `_leads_page_urls`: A dictionary containing paths to the lead search UI page. * `status_transitions`: A list of all status transitions (aggregated by start/end status) for the given period with: * `from_status_id`, `from_status_label`, `from_status_is_deleted`: Starting status (null for created leads). * `to_status_id`, `to_status_label`, `to_status_is_deleted`: Ending status. * `count`: The number that transitioned. * `_query`: The search query for those records. * `_leads_page_url`: Path to the search UI page. * `status_transitions_summary`: Status transitions summarized for the period. E.g. a lead that went A→B→C is counted as A→C.