CID mismatch with large files

[tomohiro-n]

I've noticed that the CID we pre-calculate for a file and one after it's uploaded to your service can be different.
Then I was able to reproduce the exact same mismatch(expected value was what we pre-calculated, actual was the one after upload) with one of your test cases.

Most likely, it depends on the file size. As far as we've checked, the mismatch is produced when the size is > 1.9mb or so.

The uploads a file to the service test in the upload-client package fails by changing as follows.

-    const bytes = await randomBytes(128)
+    const bytes = fs.readFileSync('/path/to/large-file')

I've confirmed that the test passes with a 400kb file.

[tomohiro-n]

More easily, changing to const bytes = await randomBytes(2_000_000) is enough for the test to fail.