feat(stage9): neutral synthesis engine — LLM-generated report from evidence package

src/nsct/api/main.py

@@ -99,6 +99,10 @@ def create_app() -> FastAPI:
     from nsct.api.stage8 import router as stage8_router
     app.include_router(stage8_router, tags=["research"])
 
+    # Mount synthesis router (Stage 9)
+    from nsct.api.synthesis import router as synthesis_router
+    app.include_router(synthesis_router, tags=["research"])
+
     return app