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>

pkg/metrics/prometheus_metrics.go

@@ -13,7 +13,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 )
 
-// BZZZMetrics provides comprehensive Prometheus metrics for the BZZZ system
+// BZZZMetrics provides comprehensive Prometheus metrics for the CHORUS system
 type BZZZMetrics struct {
 	registry       *prometheus.Registry
 	httpServer     *http.Server