feat(identify): open-set image retrieval subpackage

fix(runpod): switch base image to cu1290-torch291

sync: data_label_factory/runpod/requirements-pod.txt

sync: data_label_factory/runpod/cli.py

sync: data_label_factory/runpod/Dockerfile

feat: add data_label_factory.runpod — optional GPU path

Initial release: data-label-factory v0.1.0