feat(language): implement read_symbol_body and list_symbols (Boundary 2b)

docs: finalize SF-1 boundary 2 tracker

feat(language): polyglot AST skeleton extractors (Boundary 2)

refactor(language): migrate language plugins under commons/language (SF-1 Boundary 1)

docs(roadmap): architect feature 3.22 polyglot ast structural tool and layer DI

docs/chore: mark Feature 3.21 as 100% complete in trackers

feat(validation): integrate Traceability Engine into code pipeline e2e

feat(validation): implement C09 traceability engine (SF-1) boundary 1

feat(arch): SF-5 polyglot architecture configs

feat(drafting): implement SF-4 Generative HARA Governance

implementation of HARA

feat(validation): finalize YAML validation overrides & remove SQLite legacy

feat: SF-2 Fractal Resolution Engine and DAL Pipeline Wiring

feat: complete SF-2 Task 1 & 2 (DAL default db and resolver)

feat(config): SF-1 Implement DAL Schema & Pydantic Impact Matrix Merge