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ecfb302c72
Arduino-pico's lwIP defaults are tuned for general-purpose networking, not IoT devices. This generates a custom lwipopts.h overlay using #include_next to chain to the framework's original, then override specific settings to match ESP32's lwIP tuning. Saves ~12KB static RAM by reducing oversized buffer and pool defaults. Tested on Pico W (CYW43 WiFi) and Wiznet W5500 (Ethernet) with 500-iteration concurrent connect/disconnect stress tests.