Function reqwest_verify

crates/openshell-router/src/backend.rs:1602–1606

Helper: run `verify_backend_endpoint` and return the expected failure.

(route: &ResolvedRoute)

    /// Helper: run `verify_backend_endpoint` and return the expected failure.
    async fn reqwest_verify(route: &ResolvedRoute) -> ValidationFailure {
        verify_backend_endpoint(&reqwest::Client::new(), route)
            .await
            .expect_err("validation should fail")
    }

    /// Non-chat-completions probes (e.g. `anthropic_messages`) should not
    /// have a fallback — a 400 remains a hard failure.