Globalize autotuned system power source

audit/internal/platform/live_metrics.go

@@ -16,14 +16,17 @@ import (
 // LiveMetricSample is a single point-in-time snapshot of server metrics
 // collected for the web UI metrics page.
 type LiveMetricSample struct {
-	Timestamp  time.Time      `json:"ts"`
-	Fans       []FanReading   `json:"fans"`
-	Temps      []TempReading  `json:"temps"`
-	PowerW     float64        `json:"power_w"`
-	PSUs       []PSUReading   `json:"psus,omitempty"`
-	CPULoadPct float64        `json:"cpu_load_pct"`
-	MemLoadPct float64        `json:"mem_load_pct"`
-	GPUs       []GPUMetricRow `json:"gpus"`
+	Timestamp   time.Time      `json:"ts"`
+	Fans        []FanReading   `json:"fans"`
+	Temps       []TempReading  `json:"temps"`
+	PowerW      float64        `json:"power_w"`
+	PowerSource string         `json:"power_source,omitempty"`
+	PowerMode   string         `json:"power_mode,omitempty"`
+	PowerReason string         `json:"power_reason,omitempty"`
+	PSUs        []PSUReading   `json:"psus,omitempty"`
+	CPULoadPct  float64        `json:"cpu_load_pct"`
+	MemLoadPct  float64        `json:"mem_load_pct"`
+	GPUs        []GPUMetricRow `json:"gpus"`
 }
 
 // PSUReading is a per-slot power supply input power reading.
@@ -67,15 +70,13 @@ func SampleLiveMetrics() LiveMetricSample {
 	// Per-PSU power — populated when IPMI SDR has Power Supply entities with Watt readings
 	s.PSUs = samplePSUPower()
 
-	// System power: prefer sum of PSU AC inputs (full wall draw); fall back to DCMI.
-	if len(s.PSUs) > 0 {
-		var total float64
-		for _, p := range s.PSUs {
-			total += p.PowerW
-		}
-		s.PowerW = total
-	} else {
-		s.PowerW = sampleSystemPower()
+	// System power: use the global autotune-selected source when configured,
+	// otherwise fall back to the historical heuristic and mark the mode.
+	if powerW, decision, err := SampleSystemPowerResolved(""); err == nil {
+		s.PowerW = powerW
+		s.PowerSource = decision.EffectiveSource
+		s.PowerMode = decision.Mode
+		s.PowerReason = decision.Reason
 	}
 
 	// CPU load — from /proc/stat