Replace with canonical 42,965-row no-SynSQL set (was 60,524 full_v2)

Canonical 42,965-row (no-SynSQL) set; clarify naming

Re-push latest FULL FlagEmbedding reranker set: bird+spider+synsql+spider2(bqsf+sqlgen+crosstable+snow)=60524 rows, 25764 spider2, all rich-desc

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v2 training set (SWIFT format, 42,965 rows)

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initial commit