Should we support swift-log and swift-metrics

[adam-fowler]

There is a push for many swift server libraries to integrate with standard swift server components like swift-log and swift-metrics. Do we want to do this?

We already have a AWSLoggingMiddleware() but that just has a callback to deal with logging information and there is no logging level. We could change this to take a Logger and provide some level of control over what is output instead.

If we were to integrate swift metrics what would we want to measure? Errors, response time?

Do we want more dependencies on this project?

[fabianfett]

If we want to ensure aws-sdk-swift is also a good citizen on iOS, we should be really careful here.

[adam-fowler]

If we want to ensure aws-sdk-swift is also a good citizen on iOS, we should be really careful here.

good point

[Yasumoto]

Would love to see support for RED metrics (Requests, Error Rate, Duration) to track each request we send.

[adam-fowler]

@Yasumoto PR #245 implements RED metrics