Refactor code structure for improved readability and maintainability

memory_gateway/server.py

@@ -572,8 +572,10 @@ app.include_router(mcp_router, prefix="/mcp", tags=["mcp"])
 # Generic Memory Gateway v1 routes are imported lazily here to avoid changing
 # the existing legacy /api and /mcp startup path.
 from .api_v1 import router as api_v1_router  # noqa: E402
+from .api_v2 import router as api_v2_router  # noqa: E402
 
 app.include_router(api_v1_router)
+app.include_router(api_v2_router)
 
 
 @app.post("/api/search", dependencies=[Depends(verify_api_key)])