Bugfix/software serial.flush#2905

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gicking wants to merge 4 commits intostm32duino:mainfrom

gicking:bugfix/SoftwareSerial.flush

Commits on Jan 11, 2026

changed SerialUSB.baud() etc. to return the actual CDC line coding
gicking
committed

Commits on Jan 26, 2026

bugfix SoftwareSerial.flush(), see https://github.com/stm32duino/Arduino_Core_STM32/issues/2904
gicking
committed

Commits on Jan 27, 2026

fix: correct SerialLP3 instance name for LPUART3

Aymane-ST
authored and
gicking
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chore: enhance Nucleo L432KC system clock config

fpistm
authored and
gicking
committed