Function auth_request 

pub fn auth_request<T>(api_key: &str, body: T) -> Result<Request<T>, Error>

Wrap a request body with Bearer API key authentication metadata.

All PCS External API calls require an API key in the Authorization header. This helper creates a tonic::Request<T> with the key pre-attached.

Errors

Returns Error::InvalidApiKey if api_key contains characters that are not valid HTTP header values (CR, LF, NUL, non-visible ASCII). The previous parse().ok() path silently sent the request without auth, surfacing as a confusing Unauthenticated from PCS instead of a local config error.

Example

let req = auth_request("pk_live_abc123", ExtGetOrCreateDmReq {
    target_ppnum: "77712345678".into(),
})?;