When a print fails, DeviceErrorDialog now fetches the printer's captured camera
frame of the failure and shows it in place of the generic HMS illustration,
falling back to the local image and a drawn placeholder on older plugins or errors.
- Agent: add get_hms_snapshot through NetworkAgent / IPrinterAgent (BBL calls the
bound plugin symbol; other agents no-op, so old plugins degrade gracefully).
- DeviceManager: parse and clear m_print_error_img_id from the print-error message.
- Dialog: tiered cloud/local/placeholder image reusing the single image widget,
with a liveness-guarded async callback decoded on the UI thread.
The newer plugin adds four PrintParams fields (task_timelapse_use_internal,
extruder_cali_manual_mode, svc_context, slicer_uid) and an extra dev_model
argument to bind. Both cross the by-value C ABI boundary, so match the struct
layout and thread dev_model through the bind chain, else start_print and bind
corrupt the stack on the newer plugin. Keep 02.03.00.62 selectable as a fallback.
