fix: route klog to stderr so k8s client errors are visible

cmd/gateway/main.go

@@ -11,6 +11,7 @@ import (
 
 	"k8s.io/client-go/dynamic"
 	"k8s.io/client-go/rest"
+	"k8s.io/klog/v2"
 
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/proxy"
@@ -54,6 +55,10 @@ func main() {
 	healthChecker := server.NewHealthChecker(true, authEnabled)
 	srv.SetHealthChecker(healthChecker)
 
+	// Route klog (used by k8s client-go) to stderr so reflector errors are visible
+	klog.InitFlags(nil)
+	klog.SetOutput(os.Stderr)
+
 	// Create ServiceAdapter registry and dispatcher (phase 8)
 	registry := serviceadapter.NewRegistry(nil)
 	dispatcher := serviceadapter.NewDispatcher(registry)