Fit Nordic Full KISS with lossless assets and firmware lifetime trimming

src/Nrf52ProgramLifetime.cpp

@@ -0,0 +1,15 @@
+#if defined(NRF52_PLATFORM) && defined(MESH_NRF52_NO_PROGRAM_EXIT) && MESH_NRF52_NO_PROGRAM_EXIT
+
+// The qualified Adafruit nRF52 Arduino main never exits: the scheduler runs
+// forever and its only return path invokes NVIC_SystemReset(). Device reboot
+// and update paths also reset the MCU rather than terminating a C++ process.
+// Do not retain registrations for global process-exit cleanup which cannot
+// run. Automatic RAII destructors, explicit close/shutdown and dynamic delete
+// remain ordinary C++ operations and are unaffected by this ABI entry point.
+// nrf52_flash_trim.py enables this only for the exact reviewed core main hash.
+extern "C" __attribute__((visibility("hidden"))) int __aeabi_atexit(
+    void*, void (*)(void*), void*) {
+  return 0;
+}
+
+#endif