test: add aggregated dataset to testing ldm #904

Job	Run time
Collect changes / collect-changes	8s
Python tests / types-check	1m 24s
Python tests / lint-and-format-check	43s
Python tests / unit-tests (py313)	3m 29s
Python tests / unit-tests (py310)	2m 49s
Python tests / unit-tests (py311)	2m 52s
Python tests / unit-tests (py312)	7m 9s
Python tests / unit-tests (py39)	2m 56s
status-check	3s
	21m 33s

Provide feedback