chameleon 2.67.0

Fixed

• SessionStart no longer injects conventions from an unloadable profile. A
  profile written by a newer engine or an unsupported schema is refused by the
  loader, get_status, and PreToolUse (profile_too_new / unsupported_schema),
  but the SessionStart conventions read went straight to disk and skipped that
  check, serving guidance the rest of the engine rejects. It now gates on
  _ss_profile_loadable, so an unloadable profile injects nothing while a healthy
  one still injects (fail-safe).
• Include-anchored archetypes now get a per-edit class-contract directive. A
  Ruby Sidekiq worker (include Sidekiq::Worker) or a Python mixin carries
  dominant_include / include_frequency rather than dominant_base, and the
  archetype-facts base fallback only read dominant_base. The sole class-heavy
  archetype at ~99% include consistency was dropped; it now falls back to the
  dominant include ("includes X").