feat: add column total header indexes to DataFrameMetadata #928

Job	Run time
Collect changes / collect-changes	8s
Python tests / unit-tests (py312)	3m 14s
Python tests / lint-and-format-check	46s
Python tests / unit-tests (py313)	3m 12s
Python tests / unit-tests (py39)	3m 4s
Python tests / unit-tests (py311)	2m 58s
Python tests / unit-tests (py310)	3m 5s
Python tests / types-check	1m 22s
status-check	5s
	17m 54s

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