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b756ef952a
Reduce CPU usage when USB components are idle by disabling the component loop when there are no events or data to process. The loop is re-enabled from USB task callbacks via enable_loop_soon_any_context() when new events or data arrive. - Extract process_usb_events_() from USBClient::loop() returning bool so subclasses can combine with their own work checks for a single disable_loop() decision - Add enable_loop_soon_any_context() calls in client_event_cb and USB data input callback - Start with loop disabled in setup(), enabled by first event - Reorder USBClient members by thread-safety context - Reorder TransferStatus fields for optimal struct packing - Fix missing early return after mark_failed() in setup()
