GRC's SimpleXMLRPCServer uses register_instance() which doesn't expose system.listMethods. Wrap the connectivity check in a try/except so a Fault is treated as "connected" while ConnectionRefusedError still propagates.
Add ControlPort/Thrift support as an alternative transport to XML-RPC: New middleware: - ThriftMiddleware wrapping GNURadioControlPortClient New MCP tools: - connect_controlport, disconnect_controlport - get_knobs (with regex filtering), set_knobs (atomic) - get_knob_properties (units, min/max, description) - get_performance_counters (throughput, timing, buffers) - post_message (PMT injection to block ports) Docker support: - enable_controlport param in launch_flowgraph - ENABLE_CONTROLPORT env in entrypoint.sh - ControlPort config generation in ~/.gnuradio/config.conf Models: KnobModel, KnobPropertiesModel, PerfCounterModel, ThriftConnectionInfoModel, plus ContainerModel updates.
