Address screening request audit log (history)

Pages through the append-only request audit log, newest first: which key asked, for which address and chain, whether a cached evaluation was reused, and how rejected or failed requests ended. Requires the compliance:screening-read capability or an allowlisted platform session. Responses are compliance data: Cache-Control: no-store, never log them. Each completed request records the verdict it returned and, when a waiver cleared a flagged evaluation, the change that granted it. There is no suspicious filter here: it answers 400 VALIDATION_ERROR, like any query parameter this route does not list.