layer1: add namespace source counts

doc/thinking/2026-04-26-namespace-manager-step47.md

@@ -0,0 +1,17 @@
+# 2026-04-26 — NamespaceManager rewrite, step 47
+
+## Цель шага
+
+Сделать `NamespaceManagerSummary` информативнее для наблюдения за источниками namespace state.
+
+## Что меняем
+
+1. В summary добавляем `SourceCounts`.
+2. `Summary()` считает namespace-ы по `NamespaceSource`.
+3. `LogNamespaceManagerSummary()` пишет `source_counts`.
+4. Обновляем unit tests.
+
+## Что НЕ меняем
+
+- не меняем watcher behavior;
+- не меняем semantics state transitions.

pkg/utils/namespace_manager.go

@@ -124,6 +124,7 @@ func LogNamespaceManagerSummary(logger *zap.Logger, message string, summary Name
 	logger.Info(message,
 		zap.Int("total_namespaces", summary.TotalNamespaces),
 		zap.Any("phase_counts", summary.PhaseCounts),
+		zap.Any("source_counts", summary.SourceCounts),
 		zap.Strings("subscribers", summary.Subscribers),
 	)
 }
@@ -258,10 +259,12 @@ func (m *inMemoryNamespaceManager) Summary() NamespaceManagerSummary {
 	summary := NamespaceManagerSummary{
 		TotalNamespaces: len(records),
 		PhaseCounts:     make(map[NamespacePhase]int),
+		SourceCounts:    make(map[NamespaceSource]int),
 		Subscribers:     m.SnapshotSubscribers(),
 	}
 	for _, record := range records {
 		summary.PhaseCounts[record.Phase]++
+		summary.SourceCounts[record.Source]++
 	}
 	return summary
 }

pkg/utils/namespace_manager_model.go

@@ -76,6 +76,7 @@ type NamespaceEvent struct {
 type NamespaceManagerSummary struct {
 	TotalNamespaces int
 	PhaseCounts     map[NamespacePhase]int
+	SourceCounts    map[NamespaceSource]int
 	Subscribers     []string
 }
 

pkg/utils/namespace_manager_test.go

@@ -63,6 +63,9 @@ func TestNamespaceManagerSnapshotAndGet(t *testing.T) {
 	if summary.TotalNamespaces != 2 {
 		t.Fatalf("expected summary total namespaces to be 2, got %d", summary.TotalNamespaces)
 	}
+	if summary.SourceCounts[NamespaceSourceWatcher] != 2 {
+		t.Fatalf("expected watcher source count to be 2")
+	}
 }
 
 func TestNamespaceManagerUpsertIncrementsGeneration(t *testing.T) {
@@ -473,6 +476,9 @@ func TestNamespaceManagerSummary(t *testing.T) {
 	if !reflect.DeepEqual([]string{"router"}, summary.Subscribers) {
 		t.Fatalf("expected router subscriber in summary")
 	}
+	if summary.SourceCounts[NamespaceSourceWatcher] != 2 {
+		t.Fatalf("expected two watcher-sourced namespaces")
+	}
 }
 
 func TestLogNamespaceManagerSummaryWithNilLogger(t *testing.T) {