Update Cloud Run worker-ID import to worker_id sub-package

The plugin moved from temporalio.contrib.gcp.cloud_run into the
temporalio.contrib.gcp.cloud_run.worker_id sub-package (to avoid a
collision with the OTel Cloud Run plugin). Update the sample's import,
docstring, README doc link, and pyproject comment to the new path:

    from temporalio.contrib.gcp.cloud_run.worker_id import WorkerIDPlugin

The public name WorkerIDPlugin is unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: seanbollin

gcp_cloud_run_worker_id/README.md

@@ -2,7 +2,7 @@
 
 This sample runs a long-lived Temporal Worker in a [Google Cloud Run worker
 pool](https://cloud.google.com/run/docs/worker-pools) and uses the
-[`temporalio.contrib.gcp.cloud_run`](https://python.temporal.io/temporalio.contrib.gcp.cloud_run.html)
+[`temporalio.contrib.gcp.cloud_run.worker_id`](https://python.temporal.io/temporalio.contrib.gcp.cloud_run.worker_id.html)
 `WorkerIDPlugin` to derive the worker's identity and its Worker Deployment
 version from Cloud Run instance metadata.
 

gcp_cloud_run_worker_id/pyproject.toml

@@ -18,7 +18,7 @@ dev = [
 package = false
 
 # TEMPORARY: the Google Cloud Run plugin
-# (temporalio.contrib.gcp.cloud_run.WorkerIDPlugin) is not
+# (temporalio.contrib.gcp.cloud_run.worker_id.WorkerIDPlugin) is not
 # released yet, so this pins `temporalio` to the local SDK checkout on the
 # `cloud-run-worker-id` branch so the sample can be run and type-checked
 # locally. Remove this [tool.uv.sources] override and rely on the released

gcp_cloud_run_worker_id/worker.py

@@ -1,6 +1,6 @@
 """Run a long-lived Temporal worker on a Google Cloud Run worker pool.
 
-The worker registers ``temporalio.contrib.gcp.cloud_run.WorkerIDPlugin`` on the
+The worker registers ``temporalio.contrib.gcp.cloud_run.worker_id.WorkerIDPlugin`` on the
 client. The plugin reads Cloud Run instance metadata and automatically sets the
 client identity and a PINNED Worker Deployment version, then propagates to the
 worker. The worker runs until Cloud Run sends SIGTERM (for example, on
@@ -15,7 +15,7 @@
 from activities import compose_greeting
 from settings import load_settings
 from temporalio.client import Client
-from temporalio.contrib.gcp.cloud_run import WorkerIDPlugin
+from temporalio.contrib.gcp.cloud_run.worker_id import WorkerIDPlugin
 from temporalio.worker import Worker
 from workflows import GreetingWorkflow