Length of upload_id is enough?

[monodera]

upload_id is generated by secrets.token_hex(8) with Python (e.g, 315428a98335c916). In the documentation of secrets, I find the following description.

As of 2015, it is believed that 32 bytes (256 bits) of randomness is sufficient for the typical use-case expected for the [secrets](https://docs.python.org/3/library/secrets.html#module-secrets) module.

https://docs.python.org/3/library/secrets.html#how-many-bytes-should-tokens-use

A 32 bytes string looks like a0079371f017e22e21128ec11f80fbf4f9a80c43a1b01bca05ef57309f85b30f and it seems a bit too long.

I'd like to hear some opinion if it is sufficiently long for our purpose.

One can also look up past upload IDs for duplication and regenerate another ID.