Add `go mod tidy -diff` to CI to ensure go modules files remain tidy #972

	name: CI Build + Unit Test

	on:
	push:
	branches: ["main"]
	pull_request:
	merge_group:

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

	- name: Set up Go
	uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5.4.0
	with:
	go-version-file: go.mod

	- name: Build
	run: go version && go build -v ./...

	- name: Test
	# -count=2 ensures that test fixtures cleanup after themselves
	# because any leftover state will generally cause the second run to fail.
	run: go test -shuffle=on -count=2 -race -cover -timeout=5m ./...

	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

	- name: Set up Go
	uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5.4.0
	with:
	go-version-file: go.mod

	- run: go mod tidy -diff

	- run: go vet ./...

	- name: Check gofmt passes
	run: \|
	if [ -n "$(gofmt -l .)" ]; then
	echo "gofmt failed, please run gofmt -w ."
	exit 1
	fi

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