Track VPN pressure history

agents/rap-node-agent/cmd/rap-node-agent/main.go

@@ -910,6 +910,7 @@ func vpnFabricFlowPressureReport(snapshot vpnruntime.FabricFlowSchedulerSnapshot
 		"pressure_score":                  snapshot.PressureScore,
 		"pressure_reasons":                append([]string{}, snapshot.PressureReasons...),
 		"recommended_action":              snapshot.RecommendedAction,
+		"pressure_history":                copyFabricFlowPressureHistory(snapshot.PressureHistory),
 		"backpressure_active":             snapshot.BackpressureActive,
 		"bulk_pressure_active":            snapshot.BulkPressureActive,
 		"bulk_pressure_channel_count":     snapshot.BulkPressureChannelCount,
@@ -936,6 +937,18 @@ func vpnFabricFlowPressureReport(snapshot vpnruntime.FabricFlowSchedulerSnapshot
 	return report
 }
 
+func copyFabricFlowPressureHistory(in []vpnruntime.FabricFlowPressureHistorySample) []vpnruntime.FabricFlowPressureHistorySample {
+	if len(in) == 0 {
+		return []vpnruntime.FabricFlowPressureHistorySample{}
+	}
+	out := make([]vpnruntime.FabricFlowPressureHistorySample, 0, len(in))
+	for _, sample := range in {
+		sample.PressureReasons = append([]string{}, sample.PressureReasons...)
+		out = append(out, sample)
+	}
+	return out
+}
+
 func copyStringIntMap(in map[string]int) map[string]int {
 	if len(in) == 0 {
 		return map[string]int{}

agents/rap-node-agent/cmd/rap-node-agent/main_test.go

@@ -1260,12 +1260,25 @@ func TestVPNFabricFlowPressureReportIncludesRecommendedAction(t *testing.T) {
 		RouteRecoveredChannelCount: 0,
 		RouteRecoveryMaxMillis:     0,
 		RouteRecoveryAvgMillis:     0,
+		PressureHistory: []vpnruntime.FabricFlowPressureHistorySample{
+			{
+				ObservedAt:        "2026-05-16T12:00:00Z",
+				PressureLevel:     "warning",
+				PressureScore:     35,
+				PressureReasons:   []string{"bulk_pressure"},
+				RecommendedAction: "throttle_bulk",
+			},
+		},
 	})
 	if report["recommended_action"] != "throttle_bulk" ||
 		report["pressure_score"] != 35 ||
 		report["bulk_pressure_channel_count"] != 16 {
 		t.Fatalf("unexpected flow pressure report: %+v", report)
 	}
+	history, ok := report["pressure_history"].([]vpnruntime.FabricFlowPressureHistorySample)
+	if !ok || len(history) != 1 || history[0].RecommendedAction != "throttle_bulk" {
+		t.Fatalf("unexpected flow pressure history: %+v", report["pressure_history"])
+	}
 }
 
 func TestMergedEndpointCandidateObservationsKeepsNewest(t *testing.T) {