fix(core): close consumer when returning null after calculating offse…

…t for newest sort (#1069)

fix a memory leak 

Co-authored-by: Neeraj.singh <email@test.com>

src/main/java/org/akhq/repositories/RecordRepository.java

@@ -396,6 +396,7 @@ private Optional<EndOffsetBound> getOffsetForSortNewest(KafkaConsumer<byte[], by
                 }
 
                 if (last == partition.getFirstOffset() || last < 0) {
+                    consumer.close();
                     return null;
                 } else if (!(last - pollSizePerPartition < first)) {
                     first = last - pollSizePerPartition;