v0.25.0 - QA Introduction Accepts Any Markdown Content

Changed

• qa: the ### Introduction body now accepts any markdown content (a
  bullet list, code block, block quote, etc.), not just plain paragraphs
  -- the field is retyped from a paragraph list to an opaque markdown
  leaf. The optional leading comment and the section's optionality are
  unchanged (GitHub issue #114).

Fixed

• models/md: a soft-wrapped (CommonMark lazy-continuation) list item
  now fails with an actionable error -- field path, 1-based line, and an
  explicit "soft-wrapped/lazy-continuation list items are not supported"
  cause/fix hint -- instead of an opaque parsing failure, across every
  structurally-checked list item in all twelve whole-body domains
  (tsk, feat, rsk) (GitHub issue #99).