Switch eight S3 board defaults and 78 remaining TinyUSB recipes to hardware Serial/JTAG while preserving UART and other platforms. Restore retained S3 PHY ownership after a TinyUSB OTA restart and prepare KISS queues before enabling the driver.
Add real recipe resolution, Companion/KISS transport sanitizer coverage, and RF lifecycle reset regressions to CI. Native tests pass 1765/1765; SDK, transport, recipe and USB watchdog checks pass. Board and role cross-compilation and physical OTA qualification continue.
Switch ESP32-S3 KISS modem environments to HWCDC and move outbound KISS writes to a non-blocking queued frame path so loop() and TX completion keep progressing when the host reads slowly. Add native backpressure regression tests and correct the native_kiss_modem test filter so this suite runs directly with pio test.
mikecarper
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