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/libp2p/go-nat/gateway.go

@@ -0,0 +1,17 @@
+package nat
+
+import (
+	"net"
+
+	"github.com/libp2p/go-netroute"
+)
+
+func getDefaultGateway() (net.IP, error) {
+	router, err := netroute.New()
+	if err != nil {
+		return nil, err
+	}
+
+	_, ip, _, err := router.Route(net.IPv4zero)
+	return ip, err
+}