fix(bridge): OTA RPC 客户端预算 600s→1800s（实测传输超 10 分钟）

src/ppclock/bridge.py

@@ -161,7 +161,7 @@ class BridgeTransport:
     async def run_ota(self, image: bytes, on_progress=None):
         self._on_progress = on_progress
         try:
-            return await self._rpc("ota", 600.0, image=image.hex())
+            return await self._rpc("ota", 1800.0, image=image.hex())
         finally:
             self._on_progress = None