refactor: simplify expr checking in predicate push down #3

	name: Lint py-polars crate

	on:
	pull_request:
	paths:
	- crates/**
	- Cargo.toml
	- py-polars/src/**
	- py-polars/Cargo.toml
	- .github/workflows/lint-py-polars.yml
	push:
	branches:
	- main
	paths:
	- crates/**
	- Cargo.toml
	- py-polars/src/**
	- py-polars/Cargo.toml
	- .github/workflows/lint-py-polars.yml

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	lint-py-polars:
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: py-polars

	steps:
	- uses: actions/checkout@v4

	- name: Set up Rust
	run: rustup component add rustfmt clippy

	- name: Cache Rust
	uses: Swatinem/rust-cache@v2
	with:
	workspaces: py-polars
	save-if: ${{ github.ref_name == 'main' }}

	- name: Run cargo fmt
	run: cargo fmt --all -- --check

	- name: Run clippy
	run: cargo clippy --locked -- -D warnings

	- name: Compile without default features
	run: cargo check --no-default-features

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