007 T4: Dispatch selects a docs charter for design-doc-only diffs nf-ydf ← Beads

Twinned from https://github.com/cfsh/ninefold/issues/954 by tools/beads/import_github.py's reconcile pass.

From 007-reviewer-verdicts-for-readers.md's task table (design 007). - Depends on: T2