fix(ymodem): 修正发送 ACK 重试并统一异常清理与串口V2在控制台下使用SY失败问题#11162

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wdfk-prog wants to merge 2 commits intoRT-Thread:masterfrom

wdfk-prog:ymodem

Commits on Feb 1, 2026

fix(serial): only apply CRLF translation in STREAM mode for poll tx
wdfk-prog
committed
fix(ymodem): improve send read loop and unify session cleanup
wdfk-prog
committed