chore: add Makefile for build automation

Add comprehensive Makefile with 20+ commands for development,
testing, deployment, and infrastructure management.

Key commands:
- make dev: Start development stack
- make test: Run all tests
- make terraform-local/ansible-local: Local VM testing
- make deploy: Production deployment
- make fmt/lint/clean: Code quality

Provides unified interface for all development operations.

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

Makefile

@@ -0,0 +1,87 @@
+.PHONY: help dev test deploy clean
+
+help: ## Show this help message
+	@echo 'YDN Makefile Commands'
+	@echo '====================='
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+dev: ## Start development stack
+	docker-compose -f docker/docker-compose.yml up -d
+	@echo "Development stack started. Access: http://localhost:8080"
+
+dev-logs: ## Show development logs
+	docker-compose -f docker/docker-compose.yml logs -f
+
+dev-stop: ## Stop development stack
+	docker-compose -f docker/docker-compose.yml down
+
+test-unit: ## Run unit tests
+	cd services/api && go test -v ./...
+	cd services/worker && go test -v ./...
+	cd services/middleware && go test -v ./...
+	cd pkg && go test -v ./...
+
+test-integration: ## Run integration tests
+	cd tests/integration && go test -v ./...
+
+test-e2e: ## Run end-to-end tests (requires local VM)
+	cd tests/e2e && go test -v ./...
+
+test: test-unit test-integration ## Run all tests
+
+terraform-local: ## Provision local VM for testing
+	cd infrastructure/terraform/environments/local && terraform init && terraform apply
+
+terraform-destroy-local: ## Destroy local VM
+	cd infrastructure/terraform/environments/local && terraform destroy
+
+ansible-local: ## Configure local VM via Ansible
+	cd infrastructure/ansible && ansible-playbook -i inventory/local.yml playbooks/provision.yml
+
+ansible-production: ## Configure production VMs via Ansible
+	cd infrastructure/ansible && ansible-playbook -i inventory/production.yml playbooks/provision.yml
+
+deploy: ## Deploy to production
+	@echo "Deploying to production..."
+	./scripts/deploy.sh
+
+backup: ## Run backup scripts
+	./scripts/backup.sh
+
+lint: ## Run linters
+	cd services/api && golangci-lint run
+	cd services/worker && golangci-lint run
+	cd services/middleware && golangci-lint run
+
+fmt: ## Format code
+	cd services/api && go fmt ./...
+	cd services/worker && go fmt ./...
+	cd services/middleware && go fmt ./...
+	cd pkg && go fmt ./...
+
+clean: ## Clean up build artifacts
+	cd services/api && go clean
+	cd services/worker && go clean
+	cd services/middleware && go clean
+	cd pkg && go clean
+
+build: ## Build all services
+	cd services/api && go build -o ../../bin/api .
+	cd services/worker && go build -o ../../bin/worker .
+	cd services/middleware && go build -o ../../bin/middleware .
+
+docker-build: ## Build Docker images
+	docker-compose -f docker/docker-compose.yml build
+
+docker-push: ## Push images to private registry
+	docker-compose -f docker/docker-compose.yml push
+
+setup: ## Setup development environment
+	@echo "Setting up YDN development environment..."
+	@mkdir -p bin logs tmp
+	@go mod download
+	@go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+	@cd infrastructure/terraform && terraform init -upgrade
+	@echo "Setup complete!"
+
+init: setup ## Alias for setup