fix(file size): use Long instead of float

Float only stores up to 16 million, and file size is stored in bytes. A video can easily be over 16MB (16 million bytes), therefore Long is needed.

src/main/java/com/ddf/vodsystem/services/media/CompressionService.java

@@ -69,7 +69,7 @@ public class CompressionService {
         return command;
     }
 
-    private List<String> buildBitrate(Float length, Float fileSize) {
+    private List<String> buildBitrate(Float length, Long fileSize) {
         List<String> command = new ArrayList<>();
 
         float bitrate = ((fileSize * 8) / length) * BITRATE_MULTIPLIER;