0.2.0

• Choice.criteria and Noul.criteria now also accept a list of strings
  (candidate names for Choice, true then false for Noul), normalized to
  the same mapping shape as before; parse_wire_request and the server
  accept the equivalent wire shapes for free. No breaking changes - the
  mapping shape still works exactly as before, and to_wire_request still
  emits the mapping form.
• Gate gained per_type, an optional {"choice"/"score"/"noul": threshold} mapping. Per question, the most specific threshold wins:
  per_question, then per_type, then min_confidence. No breaking
  changes - per_type defaults to None and behavior is unchanged unless
  it's set.
• README: reframed the opening around the fallback chain, noted that laya
  now ships its own laya-serve server, and added a "Choosing a threshold"
  section with measured Jev accuracy-vs-threshold data from Jevals to guide
  min_confidence/per_type choices.