Phase 6 of the decoupling refactor (behavior-preserving move):
- topology_export.py: body_geometry / surface_geometry / topology_records
(~290 lines) moved verbatim out of build123d_adapter.py as module-level
functions; includes the circle_center_mm/radius_mm concentric-circle
evidence added by the lk_dev integration
- build123d_adapter.py: the three methods are now one-line forwards, so
kernel construction and topology evidence export live in separate files
and can evolve independently
No protocol change (GeometryAdapter untouched). Verified by:
- golden comparison: full-corpus analyze (2881 docs) + 12 complete
rebuilds -- zero field differences vs f79c287
- full test suite: 435 tests, failure set identical to baseline
