Function tail_stream_with_visibility 

pub async fn tail_stream_with_visibility(
    backend: &dyn EngineBackend,
    execution_id: &ExecutionId,
    attempt_index: AttemptIndex,
    after: StreamCursor,
    block_ms: u64,
    count_limit: u64,
    visibility: TailVisibility,
) -> Result<StreamFrames, SdkError>

Tail helper with an explicit RFC-015 TailVisibility filter.