Measuring a request

Sorry, I have two questions RE AWS EMF and this library:

1) Why isn't it part of the AWS JS SDK?

2) Use case: Measure a fetch. Lambda functions typically depend on external services and I am wondering if EMF logging is a good approach to tracking the performance of these dependencies. Or is that best left to some AWS X-ray instrumentation?

No implementation file, test, or entry point is named. Start by reviewing how this library's AWS EMF logging relates to measuring fetch calls in Lambda and how AWS X-Ray instrumentation differs, then determine whether the result belongs in usage documentation or a concrete change. Done means both questions have a documented, project-aligned answer.

Written by the indexing model from the issue text.