Bulk import status info

This endpoint returns a specific bulk import's status including the contact IDs of any newly created contacts, and emails of any contacts that failed to be created.

{
  "status":"completed",
  "success":["123","124","125","126"],
  "failure":[
    "invalid.email@invalidDomain", 
    "invalid'[email protected]"
  ]
}

The status field may contain the following values:

`Status`	Description
`waiting`	The import has been received but has not received a `uuid` and processing has not begun.
`claimed`	The import batch has received a `uuid` but processing has not begun.
`active`	The import batch is currently being processed.
`completed`	The import batch has completed processing.
`failed`	The import batch has failed and can no longer be retried.
`interrupted`	The import batch was interrupted due to failures and will not be retried.