fix: Envoy logs conversion error (#13019)

Author: kezhenxu94

docs/en/changes/changes.md

@@ -67,6 +67,7 @@
 * Add Baseline module for support alarm module query baseline data.
 * BaseLine: Support query baseline metrics names.
 * Add `Get Node List in the Cluster` API.
+* Add type descriptor when converting Envoy logs to JSON for persistence, to avoid conversion error.
 
 #### UI
 

oap-server/server-library/library-util/src/main/java/org/apache/skywalking/oap/server/library/util/ProtoBufJsonUtils.java

@@ -20,6 +20,7 @@
 
 import com.google.protobuf.BytesValue;
 import com.google.protobuf.Message;
+import com.google.protobuf.Struct;
 import com.google.protobuf.util.JsonFormat;
 import java.io.IOException;
 
@@ -32,6 +33,7 @@ public static String toJSON(Message sourceMessage) throws IOException {
                                  .TypeRegistry
                                  .newBuilder()
                                  .add(BytesValue.getDescriptor())
+                                 .add(Struct.getDescriptor())
                                  .build()
                          )
                          .print(sourceMessage);