Objects: add putNew

to avoid searching for nonexistent objects

dhfs-parent/dhfs-fs/src/main/java/com/usatiuk/dhfsfs/service/DhfsFileServiceImpl.java

@@ -83,7 +83,7 @@ public class DhfsFileServiceImpl implements DhfsFileService {
 
     private ChunkData createChunk(ByteString bytes) {
         var newChunk = new ChunkData(JObjectKey.of(UUID.randomUUID().toString()), bytes);
-        remoteTx.putData(newChunk);
+        remoteTx.putDataNew(newChunk);
         return newChunk;
     }