[zzylol]

Summary

• delete the remaining control_plane::optimizer module and directory
• move flat workload-to-deployment compatibility into physical::workload_planner
• move resource/delta/Pareto/TCO calculations into physical::deployment_cost
• move hysteresis caching into physical::plan_cache
• rename RulesPlanner, CostModelPlanner, and BaselinePlanner to deployment-oriented terminology

Architectural boundary

ASAPPlanner owns canonical intent algebra, transformations, legal summary candidates, and summary selection. ASAPQuery-backend owns physical CTSA placement, deployment cost reporting, plan caching, emission, and runtime publication. No backend optimizer namespace remains.

The flat workload adapter remains only because the existing /plan and replan wire contracts still accept QueryWorkload; its typed branch delegates summary selection to ASAPPlanner.

MVP verification

• cargo check -p control_plane -p data_plane
• cargo test -p control_plane
  • 688 library tests passed
  • 28 API/binary tests passed
  • 0 failures
  • 3 doc tests ignored

This includes physical compilation, OpAMP publication, all five sketch processors, routing, cumulative backend plans, replan, TopK evidence, and MVP workload fixtures.

Stack

Depends on #458.