Add lambda-otel4s module

[alexcardell]

Supercedes #456

• Adds lambda-natchez module
• Adds lambda-otel4s module
  • Traces lambdas with semantic conventions applied
• Adds otel4s examples
• Add scalafix migration to port natchez package imports -- (removes previous version scalafix migrations)

This is targeting otel4s 0.10.0

Links

https://opentelemetry.io/docs/specs/semconv/faas/aws-lambda/
https://opentelemetry.io/docs/specs/semconv/faas/faas-spans/

[alexcardell]

Currently pointed at a local snapshot so CI will definitely fail, as otel4s main has NoPublish for everything involving the SDK

[alexcardell]

@iRevive Updated all the attributes and removed semconv-experimental

Would appreciate another look when you have time

[iRevive]

@alexcardell the changes look good.

We still need to wait for a release of https://github.com/http4s/http4s-otel4s-middleware, right?

[alexcardell]

The middleware would be useful for the example, but I don't believe it's necessary otherwise

[armanbilge]

There are also some AWS goodies in the upcoming 0.10.0 otel4s release (for otel4s-sdk):

@iRevive is v0.10.0 coming soon?

[armanbilge]

Instead of putting these in the package object, we can put them in the companion object for KernelSource. Then they will automatically be in implicit scope without an import.

[armanbilge]

@alexcardell Can you look into this as well? 🙏

[alexcardell]

Will do

[alexcardell]

@armanbilge done :)

[iRevive]

There are also some AWS goodies in the upcoming 0.10.0 otel4s release (for otel4s-sdk):

@iRevive is v0.10.0 coming soon?

We are two PRs away from 0.10.0:

• Add AwsXRayIdGenerator otel4s#787
• core-common: AttributeKey add maybe method otel4s#780

Both are implemented, some minor changes (docs, etc) may be required.

I think we will have 0.10.0 next week.

[armanbilge]

I am going hang on for otel4s v0.10.0 to avoid back-to-back breaking releases!

[iRevive]

0.10.0 is out. It should be a straightforward update.

[armanbilge]

so fast!!

[alexcardell]

Updated

[iRevive]

There is a compatible pre-release of the http4s-otel4s - https://github.com/http4s/http4s-otel4s-middleware/releases/tag/v0.9.0-rc.2.