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>

discovery/mdns.go

@@ -30,7 +30,7 @@ type mdnsNotifee struct {
 // NewMDNSDiscovery creates a new mDNS discovery service
 func NewMDNSDiscovery(ctx context.Context, h host.Host, serviceTag string) (*MDNSDiscovery, error) {
 	if serviceTag == "" {
-		serviceTag = "bzzz-peer-discovery"
+		serviceTag = "CHORUS-peer-discovery"
 	}
 
 	discoveryCtx, cancel := context.WithCancel(ctx)