Phase 7 of the decoupling refactor (behavior-preserving move):
- legacy/llm_compiler.py, legacy/llm_engine.py: frozen build_pack path
(unused by run_cdsl_only), moved with git mv for history
- legacy/exact_rebuild.py: _run_parameterized / _run_exact /
_apply_geometric_compensations moved out of rebuild.py, including
the part-specific compensation table
- rebuild.py keeps run_rebuild / run_cdsl_only / compare_with_gold and
imports the moved functions
- llm_compiler.py / llm_engine.py become compatibility shims
Frozen zone: new capability belongs in executors/ + schema contracts.
The project-specific compensation no longer sits in the main pipeline.
