session-recap 0.5.0: Map view beside the text recap

Added

• Map view. A recap now has two views: Recap (the text, the default) and Map:
  the work's phases in order with pivots marked down to "You are here", each key
  decision with the alternatives it turned down and why, and counts of what shipped,
  what is open and what was rejected, each opening its list.
• The model writes the map's data with the recap, in the same call, as a fenced
  json recap-map block after the Markdown; it is never shown as text or copied.
• Build map for recaps written before maps: one small call that reads only the recap.
• CLI: --json carries the map under map; printed Markdown leaves it out.