For one import from GET /import/history, list the rows that did not import (type failure) or that imported but had a list subscription skipped (type partial), each with its email and the reason. This is the endpoint to use when a user asks why their import had errors. It covers imports started from the app or by an integration only; imports submitted through POST /import/bulk_import are not in the history and their reasons are only available through the import callback. Returns at most 500 rows, oldest first, and there is no paging beyond that. For partial rows the reason starts with "Imported under ID: