PR 5.1: Kaggle release packager + cover image #206

Job	Run time
Tests (Python 3.12)	8m 48s
Lint & format	7s
Type check	45s
Validate v7 lead scoring dataset	40s
Validate v6 lead scoring dataset	42s
Validate lead scoring dataset	36s
Tests (Python 3.11)	8m 54s
	20m 32s

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