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ci: run the suite weekly against re-resolved dependencies #150

Job	Run time
build and check the distribution	22s
live tests stay opt-in	19s
test (py3.13)	3m 11s
test (py3.14)	3m 40s
test (py3.12)	3m 39s
lint	9s
upstream drift (unlocked deps)	-1s
	11m 19s