Interface-driven case flow

This is the strongest live example of interface usage in the repo today.

P3 sequence

text

create reviewable interface
  -> add review_history property
  -> create case type
  -> attach interface to case type
  -> create case objects
  -> use semantic state in downstream governance flow

Why this matters

This flow shows interfaces acting as more than documentation. They are reusable semantic structure that shapes how operational objects behave.