Method _acquire_video_launch_gate

src/services/flow_client.py:1030–1036

视频请求不再做本地发车排队，直接进入取 token 并提交上游。

(
        self,
        token_id: Optional[int],
        token_video_concurrency: Optional[int],
    )

        return

    async def _acquire_video_launch_gate(
        self,
        token_id: Optional[int],
        token_video_concurrency: Optional[int],
    ) -> tuple[bool, int, int]:
        """视频请求不再做本地发车排队，直接进入取 token 并提交上游。"""
        return True, 0, 0

    async def _release_video_launch_gate(self, token_id: Optional[int]):
        """保留接口形状，当前无需释放任何本地发车状态。"""