feat(watchdog): hardware error monitor + unified component status store

- Add platform/error_patterns.go: pluggable table of kernel log patterns
  (NVIDIA/GPU, PCIe AER, storage I/O, MCE, EDAC) — extend by adding one struct
- Add app/component_status_db.go: persistent JSON store (component-status.json)
  keyed by "pcie:BDF", "storage:dev", "cpu:all", "memory:all"; OK never
  downgrades Warning or Critical
- Add webui/kmsg_watcher.go: goroutine reads /dev/kmsg during SAT tasks,
  writes Warning to DB for matched hardware errors
- Fix task status: overall_status=FAILED in summary.txt now marks task failed
- Audit routine overlays component DB statuses into bee-audit.json on every read

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

audit/internal/webui/tasks.go

@@ -173,13 +173,14 @@ func resolvePlatformStressPreset(profile string) platform.PlatformStressOptions
 
 // taskQueue manages a priority-ordered list of tasks and runs them one at a time.
 type taskQueue struct {
-	mu        sync.Mutex
-	tasks     []*Task
-	trigger   chan struct{}
-	opts      *HandlerOptions // set by startWorker
-	statePath string
-	logsDir   string
-	started   bool
+	mu          sync.Mutex
+	tasks       []*Task
+	trigger     chan struct{}
+	opts        *HandlerOptions // set by startWorker
+	statePath   string
+	logsDir     string
+	started     bool
+	kmsgWatcher *kmsgWatcher
 }
 
 var globalQueue = &taskQueue{trigger: make(chan struct{}, 1)}
@@ -411,8 +412,16 @@ func (q *taskQueue) worker() {
 			q.persistLocked()
 			q.mu.Unlock()
 
+			if q.kmsgWatcher != nil && isSATTarget(t.Target) {
+				q.kmsgWatcher.NotifyTaskStarted(t.ID, t.Target)
+			}
+
 			q.runTask(t, j, ctx)
 
+			if q.kmsgWatcher != nil {
+				q.kmsgWatcher.NotifyTaskFinished(t.ID)
+			}
+
 			q.mu.Lock()
 			now2 := time.Now()
 			t.DoneAt = &now2
@@ -618,6 +627,19 @@ func (q *taskQueue) runTask(t *Task, j *jobState, ctx context.Context) {
 		return
 	}
 
+	// If the SAT archive was produced, check overall_status and write to component DB.
+	if archive != "" {
+		archivePath := app.ExtractArchivePath(archive)
+		if err == nil {
+			if app.ReadSATOverallStatus(archivePath) == "FAILED" {
+				err = fmt.Errorf("SAT overall_status=FAILED (see summary.txt)")
+			}
+		}
+		if db := q.statusDB(); db != nil {
+			app.ApplySATResultToDB(db, t.Target, archivePath)
+		}
+	}
+
 	if err != nil {
 		if ctx.Err() != nil {
 			j.append("Aborted.")
@@ -634,6 +656,13 @@ func (q *taskQueue) runTask(t *Task, j *jobState, ctx context.Context) {
 	j.finish("")
 }
 
+func (q *taskQueue) statusDB() *app.ComponentStatusDB {
+	if q.opts == nil || q.opts.App == nil {
+		return nil
+	}
+	return q.opts.App.StatusDB
+}
+
 func splitLines(s string) []string {
 	var out []string
 	for _, l := range splitNL(s) {