Chameleon

Fixed

• The "One action, one job" API-shape principle never fired on Flask/FastAPI
  repos. The gate matched the archetype paths_pattern against controller or the
  PLURAL routes, but a Flask/FastAPI routing layer clusters as a route:py /
  router:py archetype (singularized), so "routes" in "route:py" was False and
  the principle was withheld from exactly the repos whose HTTP layer it targets.
  The gate now matches the singular route (which subsumes route/routes/router)
  plus Flask's blueprint. Verified across all ten fixtures that only genuine
  HTTP-layer archetypes trigger it (NestJS controller, Rails controllers, Flask
  blueprint+route, FastAPI route) -- no false positives; view was deliberately
  NOT added (it would match review/preview).