Integrating Arize with Ruby OpenTelemetry: API Keys & Docs Needed

I am working on a project where we are running LLM API calls and pipelines out of Ruby. I realize that currently there is not a ruby gem that is managed by Arize that does the Arize specific open telemetry stuff. However I have been able to use the base Ruby opentelemetry gem to successfully integrate with a a locally running Phoenix server. Also I see that api_key and space_id need to be set as headers when sending to https://otlp.arize.com/v1 . The same traces I can send to http://localhost:6006 are accepted without error by the cloud endpoint but do not appear in my space/project. Is there any doc on integrating with Arize directly using open telemetry that I can refer to?