[bug] file streaming broken by cryptocodec

[hulto]

Describe the bug
When using assets.copy the imix agents throws the following error:

Error decrypting response: aead::Error

With a tome result of:

    error: receiving on a closed channel

This seems to be an issue where the agent isn't pulling all bytes into the unmarshall function likely a chunking mechanism.

The cipher-text recivede by the client is shorter than that sent by the server.
8KiB

Server sends 1MiB

Tome causing the error:

def main():
    assets.copy('debug_test/assets/bash', '/tmp/bash-test')
    if not file.exists('/tmp/bash-test'):
        eprint("Asset copy failed")
        return
    if "bc5945feb8bd26203ebfafea5ce1878bb2e32cb8fb50ab7ae395cfb1e1aaaef1" != crypto.hash_file("/tmp/bash-test", "sha256"):
        eprint("Asset hash mismatch")
        return
    print("Ok!")

main()

debug_test/assets/bash Is a copy of the bash binary as an example of something large to copy.

[hulto]

Likely an issue of not consuming all bytes read-in 🤦

const DEFAULT_CODEC_BUFFER_SIZE: usize = 8 * 1024;
...
        let mut reader = buf.reader();
        let mut bytes_in = vec![0; DEFAULT_CODEC_BUFFER_SIZE];
        let bytes_read = match reader.read(&mut bytes_in) {
            Ok(n) => n,

[hulto]

Fixed aead error on files <1MB with 6f5d443394c6c3d314bff46e51157193d1587592
Need to fix issue with files > 1MB.
Likely related to #966

[hulto]

Disabling key deletion on client & server fixes large file chunking