🤖 I have created a release *beep* *boop*
---


<details><summary>2.68.0</summary>

##
[2.68.0](googleapis/sdk-platform-java@v2.67.0...v2.68.0)
(2026-03-17)


### Features

* Add client request duration metric.
([#4132](googleapis/sdk-platform-java#4132))
([487650e](googleapis/sdk-platform-java@487650e))
* Add more attributes to golden signals metrics.
([#4135](googleapis/sdk-platform-java#4135))
([bc82dcb](googleapis/sdk-platform-java@bc82dcb))
* **gax-httpjson:** add HttpJsonErrorParser utility
([#4137](googleapis/sdk-platform-java#4137))
([6fe2446](googleapis/sdk-platform-java@6fe2446))
* **generator:** add extra allowed modules that will not be removed from
the monorepo if they are present
([#4124](googleapis/sdk-platform-java#4124))
([6a440da](googleapis/sdk-platform-java@6a440da))
* **o11y:** introduce `gcp.client.repo` and `gcp.client.artifact`
attributes
([#4120](googleapis/sdk-platform-java#4120))
([4954de5](googleapis/sdk-platform-java@4954de5))
* **o11y:** Introduce `rpc.system.name` and `rpc.method` in gRPC
([#4121](googleapis/sdk-platform-java#4121))
([3593c30](googleapis/sdk-platform-java@3593c30))
* **o11y:** introduce server.port attribute
([#4128](googleapis/sdk-platform-java#4128))
([1b10e02](googleapis/sdk-platform-java@1b10e02))


### Bug Fixes

* add null checks for ApiTracerFactory in ClientContext
([#4122](googleapis/sdk-platform-java#4122))
([ded1922](googleapis/sdk-platform-java@ded1922))
* Decrease log level for directpath warnings outside GCE
([#4139](googleapis/sdk-platform-java#4139))
([5151f34](googleapis/sdk-platform-java@5151f34))
* **gax-grpc:** add pick_first fallback to direct path service config
([#4143](googleapis/sdk-platform-java#4143))
([4934ad8](googleapis/sdk-platform-java@4934ad8))
* Populate method level attributes in metrics recording
([#4149](googleapis/sdk-platform-java#4149))
([69aabf8](googleapis/sdk-platform-java@69aabf8))
* suppress warnings in generated projects for non-idiomatic durations
([#4119](googleapis/sdk-platform-java#4119))
([8a0c565](googleapis/sdk-platform-java@8a0c565))
* Use ServiceName + MethodName as the regex for Otel
([#2543](googleapis/sdk-platform-java#2543))
([8196b8f](googleapis/sdk-platform-java@8196b8f))


### Documentation

* **hermetic_build:** fix config field name in readme
([#4130](googleapis/sdk-platform-java#4130))
([0d98c37](googleapis/sdk-platform-java@0d98c37))
</details>

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

This PR adds basic implementation for client request duration metric.

The following attributes are also added:

- gcp.client.artifact. Added as instrumentation scope name of the meter.
- rpc.response.status_code. Added as a String representation of
[StatusCode.Code](https://github.com/googleapis/sdk-platform-java/blob/1b10e02c3a07f70124304bc173987979dd781cdd/gax-java/gax/src/main/java/com/google/api/gax/rpc/StatusCode.java#L44).

The overall design follows `ApiTracer`/`ApiTracerFactory` pattern,
creates `GoldenSignalsMetricsTracer`/`GoldenSignalsMetricsTracerFactory`
that implement ApiTracer/ApiTracerFactory respectively.
`GoldenSignalsMetricsTracerFactory` is expected to be passed in during
client initialization. `GoldenSignalsMetricsTracer` tracks the lifecycle
of a request and calculates the duration of client requests.