Function check_http_response 

pub async fn check_http_response(
    resp: Response,
    max_body_len: usize,
) -> Result<Response, FaucetError>

Check an HTTP response status and return a FaucetError::HttpStatus on non-success responses.

Reads the response body for error context, truncating to max_body_len bytes (default: 2048) to avoid large error messages.