dsh-todo-guard: Retaining and verifying completion evidence in DSH web

dsh-todo-guard is an MIT-licensed community plugin for DSH web, designed to mount a review layer (Review Dock) underneath the official Todo panel without modifying it. The plugin primarily addresses two major pain points: first, preserving unfinished tasks across turns, sessions, and restarts via Checkpoint Resume to resolve data loss issues in the official panel; and second, performing existence labeling on evidence paths attached to tasks to distinguish between "Verified", "Evidence Missing", or "Unverified" statuses. The plugin runs on pure local logic, requiring zero model calls and zero token consumption. Its core mechanisms include: under StrictMode, performing only stat checks on evidence paths (without reading content) to ensure non-blocking and lightweight performance; supporting the insertion of evidence paths into Todo items via natural language; and providing...