Non-isotropic length scales for graph-based Gaussian processes #99

Job	Run time
Package tests and linting (stan, 3.9)	18m 44s
Package tests and linting (stan, 3.10)	17m 49s
Package tests and linting (stan, 3.11)	18m 20s
Package tests and linting (torch, 3.9)	5m 35s
Package tests and linting (torch, 3.10)	4m 44s
Package tests and linting (torch, 3.11)	5m 21s
Package tests and linting (util, 3.9)	4m 12s
Package tests and linting (util, 3.10)	4m 33s
Package tests and linting (util, 3.11)	5m 1s
	1h 24m 19s

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