Adapts a legacy provider result (already sign-normalized by BankScraper) into the canonical shape, with synthetic metadata for the scrape window.
Legacy result + bank name + bank config used to compute dates.
Procedure with the canonical scrape result, or fail when the legacy result signals failure.
Adapts a legacy provider result (already sign-normalized by BankScraper) into the canonical shape, with synthetic metadata for the scrape window.