agent-platform release v1.1.29

klausGateway.a2a.saToken and klausGateway.upstream: set additionalProperties: true in the values schema so the klaus-gateway subchart’s own pass-through keys (a2a.saToken.{expirationSeconds,mountPath}, upstream.url) validate. These nested objects were still additionalProperties: false after the 1.1.27 a2a fix, leaving the agentic-platform HelmRelease stuck UpgradeFailed on management clusters whose rendered config supplies them.