Function wrap_stream_sync 

pub fn wrap_stream_sync<S, O, E>(stream: S) -> BoxBodySync
where
    S: Stream<Item = Result<O, E>> + Send + Sync + 'static,
    O: Into<Bytes> + 'static,
    E: Into<Box<dyn StdError + Send + Sync>> + 'static,

Wrap a stream of byte chunks into a BoxBodySync.

This is the thread-safe variant of wrap_stream, used for event streaming operations that require Sync bounds, such as lambda handlers.

The stream should produce Result<O, E> where O can be converted into Bytes and E can be converted into an error.