`GET /v1/audit/{alert_id}` — single receipt with ADR-0006 four-state discrimination.
Returns Response (not Json) so each status path can carry distinct
headers and body without fighting axum’s Result<T, E> → IntoResponse
conversion (which forces non-2xx into the Err arm).
GET
`GET /v1/audit/{alert_id}` — single receipt with ADR-0006 four-state
discrimination.
Path Parameters
Alert UUID
Response
Receipt JSON (alert + evidence wrapper)
`GET /v1/audit/{alert_id}` — single receipt with ADR-0006 four-state
discrimination.