Structured logging library support

[giortzisg]

With the addition of structured logging for sentry with #1010 we also want to also instrument the logging libraries that we already support:

• https://pkg.go.dev/log/slog / https://docs.sentry.io/platforms/go/guides/slog/
• https://pkg.go.dev/github.com/sirupsen/logrus / https://docs.sentry.io/platforms/go/guides/logrus/
• https://pkg.go.dev/github.com/rs/zerolog / https://docs.sentry.io/platforms/go/guides/zerolog/

[aldy505]

Slog should be a priority since it's easy enough to make a "middleware" out of it, and it supports context.Context, in which it's fairly easy.

References:

• https://github.com/samber/slog-multi
• https://github.com/samber/slog-sentry (although this implementation really just submit log entries as errors)
• https://github.com/samber/slog-loki (our implementation should probably look similar with this)

Also: https://github.com/aldy505/sentry-integration/blob/master/slogbreadcrumb/slogbreadcrumb.go -- though this is not working 😆

[giortzisg]

I agree, slog should be the first one to be implemented. However, library support is not an immediate priority right now. We want to be sure that logging is working without any hiccups before integrating other libraries.

[aldy505]

Made a somewhat proof of concept for slog integration: https://github.com/aldy505/sentry-integration/blob/master/sloghandler/sloghandler.go

[giortzisg]

This looks ok as an initial approach. Should we prioritize this @cleptric ?