refactor: modularize audit and harden build validation

audit/internal/collector/sensors.go

@@ -3,7 +3,6 @@ package collector
 import (
 	"bee/audit/internal/schema"
 	"encoding/json"
-	"log/slog"
 	"os/exec"
 	"sort"
 	"strconv"
@@ -12,25 +11,6 @@ import (
 
 type sensorsDoc map[string]map[string]any
 
-func collectSensors() *schema.HardwareSensors {
-	doc, err := readSensorsJSONDoc()
-	if err != nil {
-		slog.Info("sensors: unavailable, skipping", "err", err)
-		return nil
-	}
-	sensors := buildSensorsFromDoc(doc)
-	if sensors == nil || (len(sensors.Fans) == 0 && len(sensors.Power) == 0 && len(sensors.Temperatures) == 0 && len(sensors.Other) == 0) {
-		return nil
-	}
-	slog.Info("sensors: collected",
-		"fans", len(sensors.Fans),
-		"power", len(sensors.Power),
-		"temperatures", len(sensors.Temperatures),
-		"other", len(sensors.Other),
-	)
-	return sensors
-}
-
 func readSensorsJSONDoc() (sensorsDoc, error) {
 	out, err := exec.Command("sensors", "-j").Output()
 	if err != nil {