Replace archive.dtype with archive.dtypes dict that holds dtype of ev… #2434

Job	Run time
test (ubuntu-latest, 3.12)	1m 32s
pre-commit	1m 10s
test (macos-latest, 3.12)	1m 36s
pin	2m 37s
test (windows-latest, 3.12)	4m 14s
benchmarks	1m 38s
coverage	1m 38s
docs	2m 17s
examples	2m 38s
tutorials_list	4s
tutorials (tutorials/arm_repertoire.ipynb)	1m 1s
tutorials (tutorials/cma_mae.ipynb)	8m 5s
tutorials (tutorials/features/example.ipynb)	41s
tutorials (tutorials/fooling_mnist.ipynb)	3m 11s
tutorials (tutorials/lsi_mnist.ipynb)	8m 1s
tutorials (tutorials/lunar_lander.ipynb)	9m 52s
tutorials (tutorials/scalable_cma_mae.ipynb)	4m 30s
deploy	0s
	54m 45s

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