feat: implement concurrent HTTP checker with worker pool #17

	name: PR Checks

	on:
	pull_request:
	branches: [ main ]
	paths:
	- '*/.go'
	- 'go.mod'
	- 'go.sum'
	- '.github/workflows/pr-checks.yml'

	jobs:
	test:
	name: Unit Tests
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v4
	with:
	go-version: '1.24.0'

	- name: Cache Go modules
	uses: actions/cache@v3
	with:
	path: \|
	~/.cache/go-build
	~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: Download dependencies
	run: go mod download

	- name: Run tests
	run: go test -v -race -coverprofile=coverage.out ./...

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v3
	with:
	file: ./coverage.out
	flags: unittests
	name: codecov-umbrella
	fail_ci_if_error: false

	format:
	name: Format Check
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v4
	with:
	go-version: '1.24.0'

	- name: Check formatting
	run: \|
	if [ "$(gofmt -s -l . \| wc -l)" -gt 0 ]; then
	echo "The following files are not properly formatted:"
	gofmt -s -l .
	echo ""
	echo "Please run 'go fmt ./...' to fix formatting issues."
	exit 1
	fi

	lint:
	name: Lint Check
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v4
	with:
	go-version: '1.24.0'

	- name: Run golangci-lint
	uses: golangci/golangci-lint-action@v8
	with:
	version: latest
	args: --timeout=5m

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