feat: add substrait spec version to plan #48

	name: Code Generation Check

	on:
	pull_request:

	permissions:
	contents: read

	jobs:
	codegen-check:
	name: Verify Code Generation
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v5
	with:
	submodules: recursive

	- name: Run code generation in devcontainer
	uses: devcontainers/ci@v0.3
	with:
	runCmd: \|
	# fetch submodule tags since actions/checkout does not
	git submodule foreach 'git fetch --unshallow \|\| true'
	# Ensure dependencies are installed
	uv sync --extra test --extra gen_proto
	# Run all code generation steps
	make codegen

	- name: Check for uncommitted changes
	run: \|
	# Check for diffs, ignoring timestamp lines
	if ! git diff --quiet --exit-code src/substrait/gen/; then
	echo "Code generation produced changes. Generated code is out of sync!"
	echo ""
	git diff src/substrait/gen/
	echo ""
	echo "To fix this, run:"
	echo " make codegen"
	echo "Then commit the changes."
	exit 1
	fi

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