Add the B2 human review of the drone nominal pool

Add Stage-1 scene inventories for the drone nominal pool (427 frames)

Add neutral scene grounding for the dense corpus (2,018 frames)

Add annotations: ttpla_drone_v1

Add annotations: gt_corpus_v1

Add annotations: gt_dense_merged

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Card: drop references to sibling datasets

Document split layout; add per-source attribution and licenses

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Revert nominal aerial configs: restore pre-2026-08-10 layout

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initial commit