feat: add example for telemetry facade

[krishankumar01]

📑 Description

Closes https://github.com/goravel/goravel/issues/

✅ Checks

• Added test cases for my code

[greptile-apps]

Required label not found on this PR.

[hwbrzzl]

Can they be run via GitHub action and submit the trace, log, etc. to them? It's better to add some test cases in the tests folder to test the result.

[krishankumar01]

Yes, I’ll add test cases and examples for manually adding traces and emitting metrics.

[hwbrzzl]

Hey Bro, I have tested locally. I can only see the traces on jaeger http://127.0.0.1:16686/.
But somethings are missing:

1. There are no traces and logs on grafana.
2. Traces only contain the http client, but no grpc server: / -> facades.Http().Get("/grpc/user") -> grpc UserService.

I had committed my test code. Am I missing anything, please?

iShot_2026-02-14_12.48.15.mp4

[krishankumar01]

@hwbrzzl Can you test now? GRPC and HTTP client tracing was not enabled by mistake. In framework repo I was checking telemetry.instrumentation.grpc_server instead of telemetry.instrumentation.grpc_server.enabled.

[krishankumar01]

There are no traces and logs on grafana.

You will need to select the service while searching in Jaeger on Grafana.

[hwbrzzl]

@krishankumar01 Awesome, it worked. Could you add an example for how to add metrics?

[krishankumar01]

@krishankumar01 Awesome, it worked. Could you add an example for how to add metrics?

For gRPC and HTTP, metrics are emitted automatically. For custom metrics, I will add an example.

[krishankumar01]

@hwbrzzl I have added an example for metrics in user_controller and included steps to run telemetry-related test cases using CI/CD.

[hwbrzzl]

Hey @krishankumar01 I optimized the test cases, PTAL.

[krishankumar01]

Hey @krishankumar01 I optimized the test cases, PTAL.

@hwbrzzl the tests look good and have more variations.

[hwbrzzl]

Awesome!