docs: temporary Maintune web review acceptance (do not merge)

[Qiyuanqiii]

Summary

Temporary, documentation-only fixture for the owner-authorized Maintune MCP web review acceptance run. Do not merge. This PR does not change application behavior, supported surfaces, permissions, or configuration.

The acceptance path is ChatGPT Chat -> private MCP tunnel -> Maintune -> GitHub App Review. PR discovery is triggered by an explicitly recorded local import; public GitHub Webhook delivery is not claimed as tested. The dedicated App is restricted to this repository, and automatic merge and Issue processing are disabled.

Validation

• The fixture contains only Markdown prose and no credentials or external links.
• Full application tests and CLI smoke tests were not run locally for this documentation-only fixture. Repository CI will report its own results.
• Publication is only considered verified after the actual Review author, state, commit ID, and body are read back from GitHub.

Surface governance

• No Surface was added, promoted, downgraded, deprecated, or removed.
• Surface registry, contracts, platform support, compatibility and deprecation changes: not applicable.

Audit and AI disclosure

• No credentials or local runtime data are included.
• No application policy, workspace, sandbox or persistence behavior changes.
• This test does not change product status or claim release readiness.

This fixture and PR description were prepared with OpenAI Codex, using GPT-6. The precise web reviewer model will be recorded in the published review from the active ChatGPT session. No human maintainer review is requested by this test.

[cwnu-web-review-test-20260928]

Reviewed the complete Maintune-supplied diff for head 5db0740. The change adds only docs/maintune-mcp-acceptance.md as a temporary acceptance fixture and does not alter application behavior, configuration, permissions, or supported surfaces. The document clearly distinguishes local PR import from public GitHub Webhook delivery and correctly states that a queued submission alone is not proof of publication. I found no blocking correctness, safety, or wording issues in the supplied patch. CI is not being represented as fully passing: at review time, the captured check state still includes checks in progress / being rerun. This review also does not recommend merging the PR; the fixture explicitly states that the test PR must remain unmerged.

This review was conducted by Qiyuanqiii's review bot, using the model GPT-5.6 Sol. If you need a human review, please manually @.