[brianzheng206]

ran into an empty packed input after preprocessing when using the multi-threaded component container

• The preprocessor wrote into a single shared packed-input cache and returned a reference to it
• One callback would clear and refill the same cache while the first callback was still using that reference for inference

how was fixed (hopefully):

• no longer share one packed-input buffer across callbacks; packing uses a local buffer for each thread

[lucasreljic]

LGTM!