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/multiformats/go-multiaddr-dns/mock.go

@@ -0,0 +1,31 @@
+package madns
+
+import (
+	"context"
+	"net"
+)
+
+type MockResolver struct {
+	IP  map[string][]net.IPAddr
+	TXT map[string][]string
+}
+
+var _ BasicResolver = (*MockResolver)(nil)
+
+func (r *MockResolver) LookupIPAddr(ctx context.Context, name string) ([]net.IPAddr, error) {
+	results, ok := r.IP[name]
+	if ok {
+		return results, nil
+	} else {
+		return []net.IPAddr{}, nil
+	}
+}
+
+func (r *MockResolver) LookupTXT(ctx context.Context, name string) ([]string, error) {
+	results, ok := r.TXT[name]
+	if ok {
+		return results, nil
+	} else {
+		return []string{}, nil
+	}
+}