Integrate BACKBEAT SDK and resolve KACHING license validation

Major integrations and fixes:
- Added BACKBEAT SDK integration for P2P operation timing
- Implemented beat-aware status tracking for distributed operations
- Added Docker secrets support for secure license management
- Resolved KACHING license validation via HTTPS/TLS
- Updated docker-compose configuration for clean stack deployment
- Disabled rollback policies to prevent deployment failures
- Added license credential storage (CHORUS-DEV-MULTI-001)

Technical improvements:
- BACKBEAT P2P operation tracking with phase management
- Enhanced configuration system with file-based secrets
- Improved error handling for license validation
- Clean separation of KACHING and CHORUS deployment stacks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/koron/go-ssdp/Makefile

@@ -0,0 +1,71 @@
+EXAMPLES = advertise alive bye monitor search
+
+.PHONY: build
+build:
+	go build -gcflags '-e'
+
+.PHONY: test
+test:
+	go test -gcflags '-e' ./...
+
+.PHONY: bench
+bench:
+	go test -bench ./...
+
+.PHONY: tags
+tags:
+	gotags -f tags -R .
+
+.PHONY: cover
+cover:
+	mkdir -p tmp
+	go test -coverprofile tmp/_cover.out . ./internal/...
+	go tool cover -html tmp/_cover.out -o tmp/cover.html
+
+.PHONY: checkall
+checkall: vet staticcheck
+
+.PHONY: vet
+vet:
+	go vet ./...
+
+.PHONY: staticcheck
+staticcheck:
+	staticcheck ./...
+
+.PHONY: clean
+clean: examples-clean
+	go clean
+	rm -f tags
+	rm -f tmp/_cover.out tmp/cover.html
+
+# based on: github.com/koron-go/_skeleton/Makefile
+
+.PHONY: test-race
+test-race:
+	go test -race .
+
+.PHONY: examples
+examples: examples-build
+
+.PHONY: examples-build
+examples-build: $(EXAMPLES)
+
+.PHONY: examples-clean
+examples-clean:
+	rm -f $(EXAMPLES)
+
+advertise: examples/advertise/*.go *.go
+	go build ./examples/advertise
+
+alive: examples/alive/*.go *.go
+	go build ./examples/alive
+
+bye: examples/bye/*.go *.go
+	go build ./examples/bye
+
+monitor: examples/monitor/*.go *.go
+	go build ./examples/monitor
+
+search: examples/search/*.go *.go
+	go build ./examples/search