Use structured log for syncer

[n8maninger]

No description provided.

[lukechampine]

You know, the original version of the Syncer took a Logger interface. I ended up removing it because it felt redundant. But this makes me want to put it back in. Coupling the Syncer to some third-party dependency feels sinful.

Has anyone looked at https://pkg.go.dev/log/slog yet? It was added in 1.21.

[n8maninger]

I'm most familiar with Zap, but I wouldn't mind migrating everything to slog as long as we're consistent. I looked at slog when it was announced, but Zap's API and output configuration are better. I think it allocates less too.

Coupling the Syncer to some third-party dependency feels sinful.

"lukechampine.com/frand" 👀 😛

[lukechampine]

funny you mention that -- Go 1.22 has a new CSPRNG that will make frand obsolete: https://github.com/C2SP/C2SP/blob/main/chacha8rand.md

I am slightly sad about it (since I am proud of frand) but overall it will be nice to have a proper CSPRNG in the stdlib. And the design has a lot of overlap with frand, so I'll view it as a spiritual successor :P