Xcontent fix for chunk scorer (#137218)

Author: kderusso

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/rank/textsimilarity/ChunkScorerConfig.java

@@ -11,14 +11,16 @@
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.inference.ChunkingSettings;
+import org.elasticsearch.xcontent.ToXContentObject;
+import org.elasticsearch.xcontent.XContentBuilder;
 import org.elasticsearch.xpack.core.inference.chunking.ChunkingSettingsBuilder;
 import org.elasticsearch.xpack.core.inference.chunking.SentenceBoundaryChunkingSettings;
 
 import java.io.IOException;
 import java.util.Map;
 import java.util.Objects;
 
-public class ChunkScorerConfig implements Writeable {
+public class ChunkScorerConfig implements Writeable, ToXContentObject {
 
     public final Integer size;
     private final String inferenceText;
@@ -97,4 +99,15 @@ public boolean equals(Object o) {
     public int hashCode() {
         return Objects.hash(size, inferenceText, chunkingSettings);
     }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field("size", size);
+        builder.field("inference_text", inferenceText);
+        builder.field("chunking_settings");
+        chunkingSettings.toXContent(builder, params);
+        builder.endObject();
+        return builder;
+    }
 }