Add paper reference (arXiv:2606.09323) and citation

Register table_maps config in README + schema section.

Add table_maps config (per-table {row,col}_parent_idx JSON-encoded; 16,548 rows).

add NeurIPS-2026-ready Croissant file with RAI metadata

update self-references logo-lab/dlte -> logo-lab/trl-dlte

update self-references logo-lab/dlte -> logo-lab/trl-dlte

correct lake count to 54,667 (= 1379 parents + 16548 fragments + 36740 distractors)

fix lake count (54,667) + breakdown

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add dlte schema docs

add dlte LICENSES

add dlte README (manifests live; lake pending)

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initial commit