add BaseModel; store type in serialization #5639

Job	Run time
Build source distribution	21s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	5m 35s
Build wheels for cp311-manylinux_x86_64	5m 14s
Build wheels for cp311-macosx_x86_64	6m 52s
Build wheels for cp311-macosx_arm64	3m 9s
Build wheels for cp311-win_amd64	7m 30s
Build wheels for cp310-manylinux_aarch64	5m 27s
build_docker (12)	3m 47s
build_docker (_cu11, 11)	4m 6s
build_pypi_index	9s
upload_pypi	0s
deploy_pypi_index	0s
Pass testing build wheels	1s
	42m 12s

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