feat: add column total header indexes to DataFrameMetadata #930

Job	Run time
Collect changes / collect-changes	9s
Python tests / lint-and-format-check	41s
Python tests / unit-tests (py310)	2m 57s
Python tests / unit-tests (py313)	3m 41s
Python tests / unit-tests (py39)	3m 3s
Python tests / unit-tests (py312)	7m 39s
Python tests / types-check	1m 28s
Python tests / unit-tests (py311)	3m 4s
status-check	3s
	22m 45s

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