Give maintainers immediate visibility when Mantis is requested. Bare mentions now react, link the active run, and keep one run-owned status comment through proof, short-circuit, or failure.
Co-authored-by: Ayaan Zaidi <hi@obviy.us>
Add trusted ClawSweeper-label and maintainer-comment dispatch for Mantis Telegram proof. Short-circuit non-visible PRs before desktop setup while preserving exact-head, fork, credential, and comment-ownership boundaries.