PY API - Hot-reload of GO2Connection is often broken

app.restart(GO2Connection, reload_source=True) either hangs (timeout) or leaves the underlying connection in a bad state — subsequent calls hit Exception: Data channel is not open, ConnectionRefusedError, or simply TimeoutError: result expired.

Reproduced against a --replay daemon (no WebRTC at all): restart() timed out at 30s and the module became unreachable for the rest of the session. Daemon log:

[err] pubsubrpc.py  Exception in RPC handler for GO2Connection/stop:
  'ReplayConnection' object has no attribute 'stop_timer'
  File ".../dimos/robot/unitree/go2/connection.py", line 275, in stop
    self.connection.stop()
  File ".../dimos/robot/unitree/connection.py", line 129, in stop
    if self.stop_timer:

This sometimes works! but mostly not

Synced from DIM-838 by summer