Unmute EsqlSpecIT for more logging (elastic#121500)

Tracked at elastic#121411

Author: dnhatn

server/src/main/java/org/elasticsearch/index/translog/TranslogWriter.java

@@ -29,6 +29,7 @@
 import org.elasticsearch.index.engine.TranslogOperationAsserter;
 import org.elasticsearch.index.seqno.SequenceNumbers;
 import org.elasticsearch.index.shard.ShardId;
+import org.elasticsearch.search.lookup.Source;
 
 import java.io.Closeable;
 import java.io.IOException;
@@ -298,8 +299,10 @@ private synchronized boolean assertNoSeqNumberConflict(long seqNo, BytesReferenc
                             + "], with different data. "
                             + "prvOp ["
                             + prvOp
+                            + (prvOp instanceof Translog.Index index ? " source: " + Source.fromBytes(index.source()).source() : "")
                             + "], newOp ["
                             + newOp
+                            + (newOp instanceof Translog.Index index ? " source: " + Source.fromBytes(index.source()).source() : "")
                             + "]",
                         previous.v2()
                     );