refactor: migrate translate engine to GRACE-Poly v2.6 semantic protocol
- Convert all 84 contracts from legacy [DEF:] to #region/#endregion syntax
- Fix complexity tiers: 14 modules re-tiered (6 C4 route modules, 7 C4→C5 plugin services)
- Remove forbidden tags: @RATIONALE/@REJECTED stripped from C1–C4 contracts
- Add required tags: @PRE/@POST/@SIDE_EFFECT on C4, @RELATION on C3, @DATA_CONTRACT/@INVARIANT on C5
- Add belief runtime markers (reason/reflect/explore) to 7 service.py functions
- Fix @LAYER: route files → UI, plugins → Domain, superset_executor → Infra
- Fix pre-existing test mock_service fixture in test_orchestrator.py
- 196/196 translation tests pass, zero regressions
busya
9f995f22ae