hub v0.73.1: allowlist disk_health_degraded (controller v0.169.0 disk-health)

Adds disk_health_degraded to allowedEventTypes so the controller's per-disk SMART
degradation notification is ingested, not 400-rejected. Deliberately no customerMessages
entry (like offbox_enlarge_blocked) — the controller's dynamic Hungarian message (disk
label + attributes) is preserved by the templates.go fallback. Test + red-proof.

hub/internal/api/handler.go

@@ -1572,6 +1572,11 @@ var allowedEventTypes = map[string]bool{
 	"storage_reconnected":         true,
 	"disk_warning":                true,
 	"disk_critical":               true,
+	// controller v0.169.0 — per-disk SMART degradation (Rendben→Figyelmeztetés/Hiba). The controller
+	// sends a dynamic Hungarian message (disk label + the triggering attribute names), so — like
+	// offbox_enlarge_blocked — there is deliberately NO customerMessages entry (which would discard the
+	// specifics via the templates.go fallback priority).
+	"disk_health_degraded":        true,
 	"health_degraded":             true,
 	"health_critical":             true,
 	"health_recovered":            true,