Return error on inner decode failure instead of hanging, split flash-status output

lib/client/client.go

@@ -75,7 +75,7 @@ func roundTrip[T any](c *Client, req any) ([]Response[T], error) {
 		}
 		var inner any
 		if err := msgpack.Unmarshal(env.Payload, &inner); err != nil {
-			continue
+			return nil, fmt.Errorf("decode response: %w", err)
 		}
 		if devErr, ok := inner.(*DeviceError); ok {
 			return nil, devErr