fix: archive gb32960 decode failures

modules/protocols/protocol-gb32960/src/main/java/com/lingniu/ingest/protocol/gb32960/inbound/Gb32960ChannelHandler.java

@@ -109,6 +109,7 @@ public class Gb32960ChannelHandler extends SimpleChannelInboundHandler<byte[]> {
         } catch (Exception e) {
             // 解码失败只丢当前帧，不主动断开连接。真实设备偶发脏字节时，FrameDecoder 会继续寻找下一帧头。
             log.warn("[gb32960] decode failed peer={} len={}", addr(ctx), frame.length, e);
+            dispatchMalformed(ctx, frame, e.getMessage());
             return;
         }
 
@@ -224,6 +225,22 @@ public class Gb32960ChannelHandler extends SimpleChannelInboundHandler<byte[]> {
                 Instant.now());
     }
 
+    private void dispatchMalformed(ChannelHandlerContext ctx, byte[] frame, String errorMessage) {
+        Map<String, String> sourceMeta = new HashMap<>(4);
+        sourceMeta.put("vin", "unknown");
+        sourceMeta.put("peer", addr(ctx));
+        sourceMeta.put("parseError", "true");
+        sourceMeta.put("parseErrorMessage", errorMessage == null ? "" : errorMessage);
+        dispatcher.dispatch(new RawFrame(
+                ProtocolId.GB32960,
+                0,
+                0,
+                frame,
+                frame == null ? new byte[0] : frame,
+                sourceMeta,
+                Instant.now()));
+    }
+
     private static boolean requiresDurableAck(CommandType cmd) {
         return switch (cmd) {
             case VEHICLE_LOGIN,