Rust

docs: explain design choice #148

Job	Run time
Check cargo fmt	38s
cargo check	3m 46s
build with wasm-pack	2m 1s
cargo test (macos)	31m 39s
cargo test (macos-aarch64)	8m 28s
Verify MSRV (Min Supported Rust Version)	6m 43s
cargo test (win64)	43m 58s
Verify Vendored Code	45s
cargo doc	3m 33s
verify benchmark results (amd64)	10m 51s
Run sqllogictest with Postgres runner	3m 19s
clippy	2m 36s
check Cargo.toml formatting	2m 49s
circular dependency check	2m 49s
check configs.md is up-to-date	2m 28s
cargo test hash collisions (amd64)	8m 31s
cargo test (amd64)	9m 1s
cargo test datafusion-cli (amd64)	3m 34s
cargo test doc (amd64)	11m 15s
cargo examples (amd64)	2m 35s
cargo test pyarrow (amd64)	2m 34s
	2h 43m 53s

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