Change default toolBudgetRatio from 0.25 to 0.5

[onmete]

Summary

• Increase the default toolBudgetRatio from 0.25 to 0.5 to allocate more of the context window for tool token budget
• Updates the kubebuilder default marker, the runtime fallback in appserver assets, and corresponding test fixtures/assertions

Test plan

• make test passes with updated default values
• Verify CRD manifests reflect the new default after make bundle

Made with Cursor

[openshift-ci]

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[openshift-ci]

@onmete: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/images	a07c651	link	true	/test images

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