When two targets share the same color strip source, configure() resizes
the stream to the last caller's LED count. If a WLED device (934 LEDs)
starts after a serial device (fewer LEDs), the serial target sends the
full 934-LED frame over serial, massively inflating send time.
Add _fit_to_device() to truncate/tile colors to the target's actual
device LED count before sending, so each consumer only transmits what
its device needs regardless of the shared stream's current size.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
alexei.dolgolyov
1204676c30