feat(api): add unified v2 response layer

app/startup/routers_initializer.py

@@ -8,10 +8,15 @@ def init_routers(app: FastAPI):
     初始化路由
     """
     from app.api.apiv1 import api_router
+    from app.api.apiv2 import api_router_v2
+    from app.api.apiv2_utils import API_V2_STR, configure_v2_openapi
     from app.api.servarr import arr_router
     from app.api.servcookie import cookie_router
     # API路由
     app.include_router(api_router, prefix=settings.API_V1_STR)
+    # v2 API复用v1路由，仅在响应出口统一封装
+    app.include_router(api_router_v2, prefix=API_V2_STR)
+    configure_v2_openapi(app)
     # Radarr、Sonarr路由
     app.include_router(arr_router, prefix="/api/v3")
     # CookieCloud路由