Add buf configuration for protobuf validation and linting #388

	# NOTE that this is the only workflow that requires access to the
	# GitHub token. However, it is safe since in EVE repo itself we
	# only trigger this workflow on pull requests and as such making
	# it effectively read-only.
	# yamllint disable rule:line-length
	# https://docs.github.com/en/free-pro-team@latest/actions/reference/authentication-in-a-workflow#permissions-for-the-github_token
	# yamllint enable rule:line-length
	---
	name: Apache Yetus
	on: # yamllint disable-line rule:truthy
	pull_request:
	branches:
	- main

	jobs:
	yetus:
	runs-on: ubuntu-24.04
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	path: src
	fetch-depth: 0

	- name: Setup buf dependencies
	run: \|
	cd src/proto
	buf mod update \|\| buf dep update \|\| true

	- name: Yetus
	uses: apache/[email protected]
	with:
	basedir: ./src
	bufbasedir: ./src/proto
	buildtool: nobuild
	continuousimprovement: true
	githubtoken: ${{ secrets.GITHUB_TOKEN }}
	patchdir: ./out
	reviveconfig: .revive.toml

	- name: Store Yetus artifacts
	if: ${{ always() }}
	uses: actions/upload-artifact@v4
	with:
	name: 'yetus-scan'
	path: ${{ github.workspace }}/out

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