SCADABLE platform integration for ESP32. Boots, loads the
device certificate from NVS, discovers the MQTT broker via
edge.scadable.com, connects over TLS, publishes heartbeats,
and handles OTA updates. Optional streaming file upload to
uploads.scadable.com (compile-time opt-in). Customer brings
their own network (Wi-Fi / Ethernet / cellular).
ESP-IDF component library for Semtech LoRa radios, currently targeting LR20xx/LR2021, with ESP platform integration and public RAC, RALF, and RAL layers; planned to expand with SX126x and LR11xx support.