[Sebastiangmz]

Summary

• add persisted code graph extraction for Python and TypeScript/JavaScript symbols, imports, and calls
• expose find-symbol, find-references, and blast-radius through REST, MCP handlers/tools, and CLI
• extend CI and EvalFly smoke gates through Milestone 5

Verification

• PYTHONPATH=src .venv/bin/python -m pytest tests/test_m0_baseline.py tests/test_m1_services.py tests/test_m2_registry.py tests/test_citations.py tests/test_m3_citations.py tests/test_api_routes.py tests/test_mcp_handlers.py tests/test_mcp_tools.py tests/test_ui_handlers.py tests/test_m4_hybrid_retrieval.py tests/test_m5_code_graph.py → 99 passed
• .venv/bin/ruff check → OK
• PYTHONPATH=src .venv/bin/mypy → OK
• .venv/bin/python scripts/evalfly_smoke.py --suite smoke → 23 cases passed
• .venv/bin/python -m py_compile <M0-M5 runtime/test paths> → OK
• .venv/bin/python -m build → built sdist/wheel

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