self-contained: add go binary to vhd #4

	name: check-update-go-binary
	on:
	pull_request:
	paths:
	- 'pkg/proto/**'
	- 'pkg/parser/**'

	jobs:
	check-go-binary:
	runs-on: ubuntu-latest
	env:
	PARSER_BINARY: pkg/parser/bin/parser
	steps:
	- uses: actions/checkout@v4

	- name: Checkout master branch
	uses: actions/checkout@v4
	with:
	ref: 'master'
	path: 'master'

	- name: Validate Go binary
	run: \|
	if [ ! -f "${PARSER_BINARY}" ]; then
	echo "Error: Go binary has not been generated on current branch. Please run 'make update-contract' to generate the go binary."
	exit 1
	fi
	if cmp -s "${PARSER_BINARY}" "master/${PARSER_BINARY}"; then
	echo "Error: Go binary has not been updated on current branch. Please run 'make update-contract' to update the go binary."
	exit 1
	fi

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