v0.5.2 — Control via SignalR hub (APK-confirmed)

Rewrote the control channel. All REST write paths returned 403/503. APK reverse engineering found the actual control hub: wss://signalr.globetools.systems:446/mowerSupport authenticated with the GUC bearer token. Hub methods confirmed from classes2.dex: StartMowerRequest, ParkMowerRequest, PauseMowerRequest. Negotiate returns 200 — the channel is live.