fix(mcp): fail the node when an MCP tool returns isError - #7876

[probot/adapter-github-actions] a token must be passed as `env.GITHUB_TOKEN` or `with.GITHUB_TOKEN` or `with.token`, see https://github.com/probot/adapter-github-actions#usage

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: fit2cloud/LLM-CodeReview-Action@main. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/