Decode CF metadata for pre-opened datasets #1177

Job	Run time
build_sdist	14s
Build wheels on ubuntu-24.04-arm aarch64	6m 58s
Build wheels on macos-15-intel x86_64	6m 51s
Build wheels on ubuntu-22.04 x86_64	6m 31s
Build wheels on windows-latest AMD64	9m 24s
Build wheels on macos-14 arm64	5m 16s
Build wheels on windows-latest ARM64	7m 18s
upload_pypi	9s
upload_test_pypi	0s
	42m 41s

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