[Alpha] Go feature server

The Go feature server is an HTTP/gRPC endpoint that serves features. It is written in Go.

The current Go feature server needs a Python based feature Transformation service support. Please refer to the following code as an example:

At the same time, we need to configure the feature_store.yaml as following:

Here is the list of supported APIs:

The Go feature server support OTEL based Observabilities. To enable it, we need to set the global env ENABLE_OTEL_TRACING to "true" (as a string type!) in the container or your local OS.

There are example OTEL infra setup under the /go/infra/docker/otel folder.

Please check the Reference[2] for a local demo of Go feature server. If you want to see a real world example of applying Go feature server in Production, please check Reference[1].