Runs on the Task thread via functionName. HTTP requests require a Task thread.

Uses raw roUrlTransfer + WaitMessage instead of rr_Requests(). rr_Requests_run() is a standalone function whose m resolves to the component's shared m AA, and its busy-polling loop reads m.top thousands of times per second. WaitMessage() blocks at the OS level without touching m. See ADR 0014: the layering reasons there still stand even though this component no longer shares m with a render thread.