`hindsight document get <bank> <missing-id>` reported "API endpoint not
found (404)" with endpoint-path/version guidance, while the server had
answered 404 `{"detail":"Document not found"}` — pointing the operator at
an API breakage instead of an absent document.
Two things were dropping the body:
- `api.rs` only ran three of ~70 generated-client calls through
`humanize_client_error`; the rest used a bare `.await?`, so the error
rendered via progenitor's `Display` as a body-less "Unexpected
Response: Response { .. }" and the body was never read at all. Every
call now goes through a `Humanized` extension trait on the call future
(`call(..).humanized().await?`), which attaches status and body.
- `errors.rs` discarded the body in the 404/401/403/5xx branches.
`server_detail` now pulls the JSON `detail` (or the raw body) out of
the error and every branch surfaces it: a 404 that explains itself
prints "Not found (404): Document not found", and only a bodyless 404
— a genuine unknown route — keeps the path/version guidance.
Nothing in the type system stops the next call site from writing the
bare form, and no unit test exercises a real error response, so
`tests/api_error_surface.rs` checks the whole family: every statement in
`api.rs` that awaits a generated-client call must end in `.humanized()`.
Nicolò Boschi