Add datafusion-rocksdb crate with basic layout and README#337

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Commits on Oct 17, 2025

Commits on Oct 18, 2025

Fix CI: Use toolchain from rust-toolchain.toml instead of overriding to stable

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matthewmturner
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Update Rust toolchain to 1.86.0 to fix CI cargo-machete installation

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matthewmturner
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