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/jackpal/go-nat-pmp/recorder.go

@@ -0,0 +1,19 @@
+package natpmp
+
+import "time"
+
+type callObserver interface {
+	observeCall(msg []byte, result []byte, err error)
+}
+
+// A caller that records the RPC call.
+type recorder struct {
+	child    caller
+	observer callObserver
+}
+
+func (n *recorder) call(msg []byte, timeout time.Duration) (result []byte, err error) {
+	result, err = n.child.call(msg, timeout)
+	n.observer.observeCall(msg, result, err)
+	return
+}