### Elasticsearch Version

main

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

Do this

### Steps to Reproduce

```
rm /tmp/evil
for a in {0..9}; do
   for b in {0..9}; do
      echo '{"index": {}}' >> /tmp/evil
      echo '{"a": '$a', "b": '$b'}' >> /tmp/evil
   done
done
echo >> /tmp/evil

curl -uelastic:password -XDELETE localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPUT localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_bulk --data-binary @/tmp/evil
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_forcemerge?max_num_segments=1
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_refresh

curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/_esql?pretty -d'{
   "query": "FROM test | STATS MAX(a) BY a, b | KEEP a"
}'
```

### Logs (if relevant)

_No response_
x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/enrich/EnrichLookupService.java
try (ThreadContext.StoredContext ignored = threadContext.stashWithOrigin(ClientHelper.ENRICH_ORIGIN)) {
            
            transportService.sendChildRequest(
                targetNode,
                LOOKUP_ACTION_NAME,
                lookupRequest,
                parentTask,
                TransportRequestOptions.EMPTY,
                new ActionListenerResponseHandler<>(listener.map(r -> r.page), LookupResponse::new, executor)
            );
        }
    }
    private void doLookup(
        String sessionId,
        CancellableTask task,
        ShardId shardId,
        String matchType,
        String matchField,
        Page inputPage,
        List<NamedExpression> extractFields,
        ActionListener<Page> listener
    ) {
        Block inputBlock = inputPage.getBlock(0);
        if (inputBlock.areAllValuesNull()) {
            listener.onResponse(createNullResponse(inputPage.getPositionCount(), extractFields));
            return;
        }
        try {
            ShardSearchRequest shardSearchRequest = new ShardSearchRequest(shardId, 0, AliasFilter.EMPTY);
            SearchContext searchContext = searchService.createSearchContext(shardSearchRequest, SearchService.NO_TIMEOUT);