Extra 2 bytes at the beginning of signature

[xucito]

When signing detached, there are 2 more bytes at the beginning of the signature then what is expected.

https://openquantumsafe.org/liboqs/algorithms/sig/dilithium.html

There should be 4595 bytes

In the test below the sig is 4597 bytes

const test = async () => {
  const keyPair = await dilithium.keyPair();
  var sig = await dilithium.signDetached(Buffer.from("this is a test", 'utf8'), keyPair.privateKey)
  console.log(sig.length)
}

If the two bytes are trimmed, the signature is then verifiable by other implementations of dilithium.

[conradoGen]

did u check if the opposite works?
other implementation sign, this verify?

I tried to verify without the initial extra bytes and it failed to verify