Update kagent 1.x and kmcp reference docs (version conrefs changed)

[github-actions]

Automated update of the kagent 1.x API and Helm references, the kmcp API reference, and the version conrefs, based on the latest commits:

• kagent: 373b56b
• kmcp: 8f26f04

Important

A version conref moved in this run, so this is not a routine regeneration.
These values render into helm install --version lines that readers copy out of
setup/installation.md, observability/tracing.md, and observability/audit-prompts.md.
Merging asserts the guides work against the versions below, so re-test the affected
guides rather than merging on green CI alone.

-{{< version include-if="0.x" >}}0.0.9{{< /version >}}{{< version include-if="1.x" >}}0.2.0-beta4{{< /version >}}
+{{< version include-if="0.x" >}}0.0.9{{< /version >}}{{< version include-if="1.x" >}}0.2.0-beta5{{< /version >}}

Version conrefs in this run. Each is read from the same place kagent's own build reads it, except the two runtime images, which are resolved from the registry because a digest exists only once the image is pushed:

Conref	Value	Source
agent-substrate (1.x span only)	0.2.0-beta5	go/go.mod replace target
kmcp	0.3.0	go/go.mod require
kagent-tools	0.2.1	helm/kagent/Chart-template.yaml
max-kube (both committed copies)	1.35	Makefile KIND_IMAGE_VERSION
runtime-image	ghcr.io/kagent-dev/kagent/golang-adk@sha256:c8ab012e9774d50e20ffa8cd035ddebff69486a2843b3af281f5f6ebc67ab512	GHCR, at the tag in versions/kagent.md
runtime-image-claude	ghcr.io/kagent-dev/kagent/claude-harness@sha256:23b59459d66ce3162892239b035ba924cd1d64a6e3826db277599e9a98b2f36a	GHCR, at the tag in versions/kagent.md

Unchanged conref values are normal: most runs touch only the generated reference pages.

This PR was automatically generated by the Update Reference documentation workflow.

[Rachael-Graham]

Closing - workflow test only.