rumil-clean

Guided cleanup of research on a rumil question. Two modes — (a) pipeline mode wraps rumil's existing grounding/feedback clean pipelines given an evaluate call id; (b) interactive mode (default) walks a punch list conversationally, proposes each mutation, talks it through with the user, and applies accreting-only moves via the chat envelope after explicit consent. Use when rumil-review has produced a punch list and the user wants to act on it safely.