Uploading more than 40k size file into filesystem doesn't get fully uploaded

[akrambek]

Describe the bug
when uploading a file more than 40k it seems like it is only half of the file size being uploaded

To Reproduce
Steps to reproduce the behavior:

1. Use https://github.com/aklivity/zillabase/blob/develop/cli/src/main/java/io/aklivity/zillabase/cli/config/ZillabaseAdminConfig.java#L287 to setup zilla
2. Run

curl -X POST "http://localhost:7184/v1/storage/objects/images/test19.png" \                                                                                                        
     --data-binary @test1.png -v

Expected behavior
File should be uploaded fully.