layer1: add namespace manager bridge step 12

pkg/utils/namespace_manager.go

@@ -35,6 +35,15 @@ func NewNamespaceManager() NamespaceManager {
 	}
 }
 
+func NewBootstrappedNamespaceManager(resolver *NamespaceResolver, source NamespaceSource, observedAt time.Time) NamespaceManager {
+	manager := NewNamespaceManager()
+	if resolver == nil {
+		return manager
+	}
+	manager.Bootstrap(resolver.Snapshot(), source, observedAt)
+	return manager
+}
+
 func (m *inMemoryNamespaceManager) Subscribe(subscriber NamespaceSubscriber) {
 	m.mu.Lock()
 	defer m.mu.Unlock()