feature: report ESP-NN conv dispatch stats (accel vs s8_ref fallback) in the bench firmware - #20
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… in the bench firmware
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Adds
tigris_esp_nn_print_conv_stats()before BENCH_DONE forBENCH_KERNEL_ESP_NNbuilds, so the ESP32-S3 bench firmware reportsConv dispatch: sram=/psram=/fallback=. This makes ESP-NN acceleration engagement visible (fallback=0 means every conv took the accelerated adapter, not s8_ref) - the diagnostic that confirmed tigris-runtime#40 and is useful for the accelerated bench capstone.