Pre-review a KYC packet

Advisory dry-run of a regulated-KYC packet before submitting: reviews the exact documents the regulator will see (referenced by the ids from POST /v1/phone-numbers/kyc/upload-document) against the declared values and address, and returns plain-language advisories for likely decline reasons (wrong document type, mismatched address, one-sided ID scans). Non-blocking: advisories are warnings, submitting anyway is always allowed, and any review failure degrades to an empty list.