Link the arXiv preprint (arXiv:2608.26737)

configs: point producing_code.repo at the public repo, not the private research tree

model card: add the free PS3-SemanticKITTI route for the synthetic pool

docs: record the IEEE DataPort DOI 10.21227/nqgf-9k39

docs: refresh THIRD_PARTY_NOTICES.md after the 2026-08-23 corrections

docs: refresh README.md after the 2026-08-23 corrections

docs: refresh LICENSE after the 2026-08-23 corrections

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initial commit