fix notifications

internal/topology/watcher.go

@@ -24,9 +24,10 @@ import (
 // Registry serves the latest Snapshot. A nil *Registry resolves nothing, so
 // callers need no cluster to run.
 type Registry struct {
-	snap  atomic.Pointer[Snapshot]
-	dirty atomic.Bool
-	built atomic.Int64 // unix seconds of the last rebuild
+	snap   atomic.Pointer[Snapshot]
+	dirty  atomic.Bool
+	built  atomic.Int64 // unix seconds of the last rebuild
+	client kubernetes.Interface // for on-demand pod lookups; nil outside a cluster
 }
 
 // Resolve returns the backends serving host+path.
@@ -79,7 +80,7 @@ func NewFromEnv(ctx context.Context) (*Registry, error) {
 	svc := factory.Core().V1().Services().Informer()
 	dep := factory.Apps().V1().Deployments().Informer()
 
-	r := &Registry{}
+	r := &Registry{client: client}
 	mark := cache.ResourceEventHandlerFuncs{
 		AddFunc:    func(any) { r.dirty.Store(true) },
 		UpdateFunc: func(_, _ any) { r.dirty.Store(true) },